Biographie

CV Herbert Keppner
Born in 1954 at Waldshut, Germany.
From 1976-1987 studies at University of Konstanz.
Diploma at University of Konstanz (1981)
PhD thesis (1987) in the field of solid state physics, solar cells, plasma technology.
From 1988 to 1998, chief assistant at University of Neuchâtel in photovoltaic research, and applied plasma technology.
Habilitation (1996) Privat-Docent at University of Neuchâtel.
From 1998-2017 Professor in Microtechnology at the University of Applied Science (HE-ARC).
Lectures:
Plasma technology at Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM, Besancon, France) from 2002 to 2017.
Plasma technology at University of Neuchâtel from 2005-2007.
Highlights in Microtechnology at University of Neuchâtel / EPFL: at Neuchâtel from 2008-2013
Microsystems engineering at University of Berne from 2009 – 2017
Lectures/laboratory in Micro-technology
sensors
physics of semiconductor devices
at University of Applied Sciences HES-SO / HE-ARC Neuchâtel permanently (1998- 2017).

Projects
Since 2000 lead of 115 national projects and lead of two international (FP6 and FP7) projects, and participation of three further EU projects (FP7, H2020, and CH-Pol).
among them:
27 CTI projects totally 5.3 MCHF
5 EU projects totally 3.06 MCHF
2 BFE (Bundesamt für Energiewirtschaft) totally 0.197 MCHF
2 space projects totally .04 MCHF
67 HES-SO fianced projects, totally 4.2 MCHF
2 foundation projects 0.29 MCHF
16 direct mandants toatlly 1.06 MCHF

Key activities of Herbert Keppner at HE-ARC:
Mostly activities in the fields of photovoltaics, Thin films piezo devices, thermoelectric generators, plasma technology, biomedical engineering, and micromachining for watchmaking, MEMS (Micro electro mechanical systems), energy harvesting systems, sensors and actuators.

if you want to see the key activities, please look here:

patents :
1. H. Keppner:
« Photovoltaic cell and method for fabrication of said cell ».
Universite de Neuchatel, David and Bujold, December 31, 1996:
US05589008 WO/1995/010856 (34 worldwide citation)

2.    M. Goetz, W. Hotz, H. Keppner:
« Coating substrate ».
Alusuisse Technology & Management, Cohen Pontani Lieberman & Pavane, September 26, 2000:
US06124039 TW086104282 CA2250535, WO/1997/038145 EP0914486-A1 (32 worldwide citation)

3.    H. Keppner:
« Miniature thermoelectric converter with high integration ».
Px Tech, July 30, 2003:
EP1331674-A1 WO/2003/063257 (1 worldwide citation)

4.    D. Fischer, P. Torres, H. Keppner:
« Photovoltaic product and process of fabrication thereof ».
Vhf Technologies, April 21, 2004:
EP1411556-A1 US20040112425-A1 (2 worldwide citation)

5.    H. Keppner, R. Buser, F. Zumkehr, J. Burger
« Thermal flow sensor having recesses in a substrate ».
Codman & Shurtleff, May 2006
US 7036369 B2 (2004), EP1612523A2, EP1612523A3, EP1612523B1, US20060000273

6.    H. Keppner, M. Benkhaïra
« Method for producing a plastic membrane device and the thus obtained device »
Ecole d’ Ingenieurs Arc, June 2006:
US 8092892 B2 CN100549735C, CN101099095A, DE602004006005D1, DE602004006005T2, DE602004006005T8, EP1672394A1, EP1672394B1, US20090246546, WO2006063955A1 CN200580046044 (6 worldwide citation).

7.    H. Keppner, E. Laux, S. Brunner, L. Jeandupeux, D. Grange, L. Piervittori ;
« Lentille optique et procédé de Modification de la longueur focale d’une telle lentille optique »,
Ecole d’ Ingenieurs Arc, June 2006:
EP 13184201.5, 12. 09. 2013.

8.    A. Hogg, H. Keppner, T. Aellen, J. Burger
« Plasma enhanced polymer ultra-thin multi-layer packaging »
Medos International Sarl, June 2012
US 8313811 B2 CA2770610A1, EP2464280A1, US20110038130, WO2011018707A1

9.    A. Hogg, H. Keppner, T. Aellen, J. Burger
« Ultra-thin multi-layer packaging »
Medos International Sarl ; June 2012
US 8313819 B2 CA2770611A1, EP2464421A2, EP2464421B1, US20110039050, WO2011018709A2, WO2011018709A3, WO2011018709A8

10.   A. Hogg, H. Keppner, J. Charmet, T. Aellen, J. Burger:
« Packaging with active protection layer ».
Medos International Sarl, January 29, 2013:
US08361591 EP2464281-A1 US20110038131-A1 WO 2011/018705

11.   T. Dietz, F. Stulen, W. Olson, W. Dannaher, J. W. Willis, S. Rhee, J. Burger, P. Margairaz, R. Lockhart, F. Friedrich, D. Briand, H. Keppner, J. P. Sandoz:
« Ultrasonic Surgical Apparatus With Silicon Waveguide ».
Ethicon Endo Surgery, Johnson Philip S, July 24, 2014:
WO/2014/113270

12.   S. Brun, S. Guerin Deletang, H. Keppner, S. Farine, E. Guyot :
« Device For Securing A Crystal To A Watch Case », November 16, 2016:
Ep3092531-A2

13.   A. Hogg, Y. Tardy, T. Aellen, H. Keppner, J. Burger:
« Three dimensional packaging for medical implants ».
MEDOS INTERNATIONAL R L, May 24, 2016:
US09345813

Publications
136 P.Pérez, S.Uhl, E.Laux, P.Sanglard, R.Marti, H. Keppner, and E.Vanoli; “Synthesis and Structure modification of Ionic Liquids to optimize their Thermoelectric Properties”; submitted to Science Direct, Materials today: Proccedings of the 16 ETC conference Lisbon; (2016).

135 E.Laux, S.Uhl, N.Gauthier, L.Jeandupeux, H. Keppner, P.Pérez López, S.Pauline, E.Vanoli, and R.Marti; “Development of Thermoelectric generator based on Ionic Liquids for high temperature applications”; submitted to Science Direct, Materials today: Proccedings of the 16 ETC conference Lisbon; (2016).

134 S. Uhl, E. Laux, T. Journot, L. Piervittori, L. Jeandupeux and H. Keppner ; “Potential of Thermoelectric Generators based on Ionic Liquids”; Journal of Energy challenges and Mechanics; Volume 3 issue 2, article 1;http://www.nscj.co.uk/JECM/; (2016).

133 E. Laux, S. Uhl, T. Journot, J.Brossard, L.Jenadupeux, and H. Keppner ; “Aspects of Protonic Ionic Liquid as Electrolyte in Thermoelectric Generators”; Journal of ELECTRONIC MATERIALS, Vol. 45, No. 7; DOI: 10.1007/s11664-016-4526-1; (2016).

132 A. Homsy, J.-P. Bourgeois, L. Stoppini, P. Passeraub, A. Hogg, H. Keppner, Programme Diagnostic Biochips: Muchsens, presented at the Lab Innovation conference, Lausanne, Switzerland; (2016).

131 P. Senn, M. Roccio, S. Hahnewald, C. Frick, M. Kwiatkowska, M. Ishikawa, P.Bako, Hao Li, F. Edin, Wei Liu, H. R.-Andersen, I.Pyykkö, J. Zou, M. Mannerström, H. Keppner, A. Kaempfer-Homsy, E. Laux, M. Llera, J.-P. Lellouche S.Ostrovsky, E.Banin, M.Natan, A.Gedanken, N.Perkas, U.Wank, K.-H.Wiesmüller, P.Mistrik, H. Benav, C. Garnham, C. Jolly, F. Gander, P.Ulrich, M.Mueller, H.Loewenheim; “NANOCI - Nanotechnology based cochlear implant with gapless interface to auditory” ; submitted to Otology & Neurotology; (2016).

130 A.Sosnowska, M. Barycki, A. Gajewicz, M. Bobrowski, S. Freza, P. Skurski, S. Uhl, E. Laux, T. Journot, L. Jeandupeux, H. Keppner, T. Puzyn; “Towards the Application of Structure Property Relation ship Modeling in Materials Science: Predicting the Seebeck Coefficient for Ionic Liquid/Redox Couple Systems”. A European Journal of chemical physics and physical chemistry, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, 1591-1600, ChemPhysChem. 2016,17,1591–1600; (2016).

129 M. Llera, T. Aellen, J. Hervas, Y. Salvadé, P. Senn, S. Le Floch, and H. Keppner; Liquid-air based Fabry-Pérot cavity on fiber tip sensor; Optics Express 141(24 8):267-279; (2016).

128 S. Chevalliot, G.Malet, H. Keppner, and B. Berge; “Insulating materials requirements for low power consumption electrowetting-based liquid lenses”; Langmuir, 32(51) pp 13585 – 13592 (2016) DOI: 10.1021/acs.langmuir.6b03237; (2016).

127 M. Barycki, A. Sosnowska, A Gajewicz, M Bobrowski, D. Wilenska, P. Skurski, A. Giełdon, C.Czaplewski, S. Uhl, E.Laux, T. Journot, L Jeandupeux, H.Keppner, T.Puzyn; “Temperature-dependent structure-property modeling of viscosity for ionic liquids”. Fluid Phase Equilibria 427 (2016) 9-17; research gate; (2016).

126 F. Clavica, A. Homsy, L. Jeandupeux, H. Keppner, and D. Obrist ; “Blood Cell Dynamics in a Simple Model of Microvascular Networks”. 1 SCIENTIFIC Reports DOI: 10.1038/srep36763 ; (2016).

125 A. Homsy, E. Laux, J. Brossard, H. J. Whitlow, M. Roccio, S. Hahnewald, P. Senn, P. Mistrík, R. Hessler, T. Melchionna, C. Frick, H. Löwenheim, M. Müller, U. Wank, K.-H. Wiesmüller, and H. Keppner “Fine control of drug delivery for cochlear implant applications” Hearing, Balance and Communication Vol. 13 Iss. 4,. http:/ /dx.doi.org/10.3109/21695717.2015.1048082; (2015).

124 M. Natan, F. Edin, N. Perkas, G. Yacobi, I. Perelshtein, E. Segal, A. Homsy, E. Laux, H. Keppner, H. Rask-Andersen, A. Gedanken and E. Banin, “Two Are Better than One: Combination of ZnO and MgF2 Nanoparticles Reduces Streptococcus pneumoniae Biofilm Formation on Cochlear Implants”, Advanced Functional Materials, doi : 10.1002/adfm.201504525; (2015).

123 A. Homsy, E. Laux, L. Jeandupeux; J. Charmet, O. Banakh, Y. Rebetez, and H. Keppner ; « General aspects of solid on liquid growth mechanisms » ; Microelectronic Engineering, 141, 267–79, 2015.
doi:10.1016/j.mee.2015.03.068 ; (2015).

122 S. Uhl, M. Pellet, J. Tschanz, E. Laux, T. Journot, L. Jeandupeux, H. Keppner ; Fabrication of highly-integrated thermoelectric generators based on Ionic Liquids ; Materials today: proceedings 47(2); DOI: 10.1016/j.matpr.2015.05.084 ; (2015).

121 H. Keppner, S. Uhl, E. Laux, L. Jeandupeux, J. Tschanz and T. Journot; “Ionic Liquid-based Thermoelectric     Generator: Links between Liquid Data and Generator Characteristics”; Materials today: proceedings 6(2) ; DOI: 10.1016/j.matpr.2015.05.086 ; (2015).

120 H. Keppner, J. Depeyre, E.M Staderini: "Miniaturized capnometer sensor based on the ionization quenching effect". IEEE Biomedical Circuits and Systems Conference, 2014. BIOCAS 2014 ; (2014).

119 H.J. Whitlow, P. Jeanneret, E. Guibert, S. Brun, R. Norarat, M. Bergamin, A. Homsy, E. Laux, H. Keppner, S. Schintke, V. Savu, and J. Brugger ; « Micro- and Nano-patterning using MeV ions with stencil and aperture masks »; 40th International Conference on Micro and Nano Engineering (2014).

118 F. Galeoti, A. Andicsova, F. Bertini, E. Laux, L. Hartmann, O. Khale, H. Damsir, William Porzio, Luc Stoppini, Herbert Keppner, and Chiara Botta ; « Enhanced elasticity in parylene thin films by copolymerization Approach » ; J Mater Sci (2014) 49:7547–7555;
DOI 10.1007/s10853-014-8462-2 ; (2014).

119 H.J. Whitlow, R. Norarat, M. Roccio, P. Jeanneret, E. Guibert, M. Bergamin, G. Fiorucci, A. Homsy, E. Laux, H. Keppner, P. Senn ; « MeV ion beam lithography of biocompatible halogenated Parylenes using aperture masks » ; Elsevier 0168-583X ; DOI 10.1016/j.nimb.2014.10.024 ; (2014).

118 D. Wileńska, I. Anusiewicz, S. Freza, M. Bobrowski, E. Laux, S. Uhl, H. Keppner, and P. Skurski; “Predicting the viscosity and electrical conductivity of ionic liquids on the basis of theoretically calculated ionic volumes”, Molecular Physics: An International Journal at the Interface between Chemistry and Physics, DOI:10.1080/00268976.2014.964344; http://dx.doi.org/10.1080/00268976.2014.964344; (2014).

117 S. Uhl, E. Laux, T. Journot, L. Jeandupeux, J. Charmet, H. Keppner ; “Development of Flexible Micro-Thermo-electrochemical Generators Based on Ionic Liquids” ; Journal of ELECTRONIC MATERIALS ; DOI: 10.1007/s11664-014-3126-1 © 2014 TMS; (2014).

116 A. Hogg, S. Uhl , F. Feuvrier, Y. Girardet, B. Graf, T. Aellen, H. Keppner, Y. Tardy, and J. Burger ; Protective multilayer packaging for long-term implantable medical devices ; Surface & Coatings Technology 255; pp.124–129; (2014).

115 H.Keppner, and partners from NANOCI consortium; “Nanotechnology used in NANOCI”
51st Inner Ear Biology Workshop (IEB 2014) Sheffield UK; (2013).

114 J. Charmet, J. Bitterli, O. Sereda, M. Liley, P. Renaud, and H. Keppner ; « Optimizing Parylene C Adhesion for MEMS Processes: Potassium Hydroxide Wet Etching » ;
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 22, NO. 4;
DOI: 10.1109/JMEMS.2013.2248126; (2013).

113 A Hogg, TAellen, Suhl, BGraf, H. Keppner , Y.Tardy ; and J. Burger; “Ultra-thin layer packaging for implantable electronic devices”
Journal of Micromechanics and Microengineering 23(7):075001; DOI: 10.1088/0960-1317/23/7/075001. (2013).

112 J.-B. Orhan, E. Vallat-Sauvain, M. Marmello, U. Kroll, J. Meier, E. Laux, D. Grange, S., Farine Brunner, and H. Keppner “Novel Intermediate Reflector Layer for Optical and Morphological Tuning in the Micromorph Thin Film Tandem Cell”
MRS Online Proceeding Library Archive 1536; DOI: 10.1557/opl.2013.743; (2013).

111 F. Friedrich, R. Lockhart, D. Briand, D. Isarakorn, P. Margairaz, J-P. Sandoz, J. Brossard, H.Keppner, W. Olson, T. Dietz, N. de Rooij, J. Burger, “Silicon micromachined ultrasonic transducer with improved power transfer for cutting applications” ; Ultrasonics Symposium (IUS), IEEE International ; DOI: 10.1109/ULTSYM.2012.0291; (2012).

110 S. Kiel, O. Grinberg, N. Perkas, J. Charmet, H. Keppner and A. Gedanken ; “Forming nanoparticles of water-soluble ionic molecules and embedding them into polymer and glass substrates” ; Beilstein Journal of Nanotechnology ; 3, 267–276; Doi:10.3762/bjnano.3.30; (2012).

109 A. Bolognesi, S. Arnautov, J. Charmet, H. Keppner; “New approach to chemical functionalization of poly(2-chloroxylylene) thin films ”Journal of Applied Polymer Science 119(3); pp. 1528 - 1531
DOI: 10.1002/app.32795; (2011).

108 N. Perkas, G. Amirian, O. Girshevitz, J. Charmet, E. Laux, G. Guibert, H. Keppner, and A. Gedanken.
“Modification of Parylene film-coated glass with TiO2 nanoparticles and its photocatalytic properties”.
Surface and Coatings Technology 205(10); pp.3190-3197 ; DOI: 10.1016/j.surfcoat.2010.11.034; (2011).

107 W. Porzio, G. Scavia, S. Arnautov, L. Conzatti, J. Charmet , E. Laux, H. Keppner, G. Zerbi, L. Brambilla, and A. Bolognesi; “Nanoscale structure and morphology of thin films of poly(2-chloroxylylene) synthesized by the CVD method on different liquids”
European Polymer Journal 47(9); pp. 1725-1735 DOI: 10.1016/j.eurpolymj.2011.06.016; (2011).

106 S. Brun, G. Guibert, C. Meunier, E. Guibert, H. Keppner, S. Mikhailov; “Rapid and direct micro-machining/patterning of polymer materials by oxygen MeV ion beam irradiation through masks”; Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 269(20); pp. 2422-2426;; DOI: 10.1016/j.nimb.2011.02.058; (2011).

105 H. Gershi, A. Gedanken, H. Keppner, H. Cohen ; “One-step synthesis of prolate spheroidal-shaped carbon produced by the thermolysis of octene under its autogenic pressure” Carbon 49
(2011) pp. 1067 –1074; (2011).

104 M. Naddaka, F. Asen, S. Freza, M. Bobrowski, P. Skurski, E. Laux, J. Charmet, H. Keppner, M. Bauer, J-P. Lelluche; “Functionalization of Parylene During Its Chemical Vapor Deposition”; Journal of Polymer Science A: Polymer Chemistry DOI 10.1002/POLA 24731; (2010).

103 T. Bork, A. Hogg, M. Lempen, D. Müller, D. Joss, T. Bardyn, P. Büchler, H. Keppner, S. Braun, Y. Tardy, J. Burger ; « Development and in-vitro characterization of an implantable flow sensing transducer for hydrocephalus » Biomed Microdevices ; 12:607–618
DOI 10.1007/s10544-010-9413-6 ; (2010).

102 J. Charmet, O. Banakh, E. Laux, B. Graf, F. Dias, A. Dunand, H. Keppner, G. Gorodyska, M. Textor, W. Noell, N.F. de Rooij, A. Neels, M. Dadras, A. Dommann, H. Knapp, Ch. Borter, M. Benkhaira, “Solid on liquid deposition”, Thin Solid Films 518 pp 5061–5065; (2010).

101 G. Applerot, R. Abu-Mukh, A. Irzh, J. Charmet, H. Keppner, E. Laux, G. Guibert, and A. Gedanken, “Decorating Parylene-Coated Glass with ZnO Nanoparticles for Antibacterial Applications: A Comparative Study of Sonochemical, Microwave, and Microwave-Plasma Coating Routes” ; Applied Materials & Interfaces ; 1052 VOL. 2, NO. 4, pp 1052–1059; (2010).

100 J. Charmet, O. Banakh, E. Laux, B. Graf, F. Dias, A. Dunand, G. Gorodyska, M. Textor, W. Noell, N. F. de Rooij, A. Neels, M. Dadras, A. Dommann, H. Knapp, Ch. Borter, M. Benkhaira and H. Keppner. “Solid on liquid deposition”. Thin Solid Films (2010). doi: 10.1016/j.tsf.2010.02.039; (2010).
99    J. Burger, T. Bork, A. Hogg, M. Lempen, D. Mueller, D. Joss, T. Bardyn, P. Buechler, H . Keppner , Y. Tardy ; « n-vitro characterization of an implantable thermal flow sensor for hydrocephalus” DOI: 10.1007/978-3-642-03887-7_77
In book: World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, Munich, Germany, pp.265-268 ; (2009).

98    I. García, A. Ruiz de Luzuriaga, H. Grande, L. Jeandupeux, J. Charmet, E. Laux, H. Keppner, D. Mecerreyes, G. Cabanero, “Parylene nanocomposites using modiﬁed magnetic nanoparticle”, Mater. Chem. Phys. (2010), doi:10.1016/j.matchemphys.2010.07.060; (2009).

97    N. Perkas, G. Amirian, O. Girshevitz, J. Charmet, E. Laux, G. Guibert, H. Keppner, and A. Gedanken. “Modification of parylene film-coated glass with TiO2 nanoparticles and its photocatalytic properties”. Surf. Coat. Tech (2010) doi:10.1016/j.surfcoat.2010.11.034; (2009).

96    J. Charmet, H. Haquette, E. Laux, G. Gorodyska, M. Textor, G. Spinola Durante, E. Portuondo-Campa, H. Knapp, R. Bitterli, W.Noell, and H. Keppner; “Liquidas template for next generation micro devices” ; Journal of Physics: Conference Series ; Processes in Isotopes and Molecules, IOP Publishing 182 012021 ; Doi:10.1088/1742-6596/182/1/012021; (2009).

95    E Laux, J Charmet, H Haquette, O Banakh, L Jeandupeux, B Graf and H Keppner ; “General aspects of solid on liquid growth mechanisms” ; Journal of Physics: Conference Series ; Processes in Isotopes and Molecules, IOP Publishing 182 012029 ; Doi:10.1088/1742-6596/182/1/012029; (2009).

94    A. Bolognesi, C. Botta, A. Andicsova, U. Giovanella, S. Arnautov, J. Charmet, E. Laux, H. Keppner ; “Chemical Binding of Unsaturated Fluorenes to Poly(2-chloroxylylene) Thin Films” ; Macromol. Chem. Phys, 210, Vol 23 pp. 2052-2057 ;WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim ; DOI:10.1002/macp.200900321; (2009).

93    Chapter: Glass-Polymer Bonding
Janko Auerswald · Philippe Niedermann · Henri Haquette · Francisco Diaz, Herbert Keppner, and·Helmut. F. Knapp. „Glass-Polymer bonding“ Encyclopedia of Micro and Nano fluidics; Springer-Verlag, Donquing LI, pp. 779; DOI: 10.1007/978-642-27758-0_625-5; (2008).

92    Bardyn, T; Burger, J; Bork, T; Hogg, A; Keppner, A; Büchler, P
« Multiphysics finite element analysis of a CSF flowsensor ».
OAI identifier: oai:boris.unibe.ch:29089 ; (2008).

91    Y. Zhiyong, H. Keppner, D. Laub, E. Mielczarski, J. Mielczarski, L. Kiwi-Minsker, A. Renken, J. Kiwi, « Photocatalytic discoloration of Methyl Orange on innovative parylene TiO2 ﬂexible thin ﬁlms under simulated sunlight », Applied Catalysis B: Environmental 79, pp63–71, (2008).

90    A. Hogg, M. Lampen, F. Page, F. Zumkehr, H. Keppner, Ph. Büchler, T. Bardyn, T. Borg, Y. Tardi, J. Burger ; « Implantable Thermal Flow Sensor for Neurosurgical Applications with Asymmetric Design for High Flow Ranges » Conference: Automatisierungstechnische Verfahren für die Medizin, Fortschrittsberichte VDI, Reihe 17, Nr. 267, p. 63-64, Volume: ISBN: 978-3-18-326717-0 ; (2007).

89    H. Le Dréo, O. Banakh, H. Keppner, P.-A. Steinmann, D. Briand, N.F. de Rooij
“Optical, electrical and mechanical properties of the tantalum oxynitride thin films deposited by pulsing reactive gas sputtering”. Thin Solid Films, 515 (2006) 952-95; (2006).

88    J.J. Niederhauser, M. Jaeger, M. Hejazi, H. Keppner and M. Frenz , Transparent ITO coated PVDF transducer for optoacoustic depth profiling, Optics Communications, Volume 253, Issues 4-6, p.p 401-406, (2005).

87    D. Briand, G. Mondin, S. Jenny, P.D. van der Wal, S. Jeanneret, N. de Rooij, O. Banakh, H. Keppner, “Metallo-organic low-pressure chemical vapor deposition of Ta2O5 using TaC12H30O5N as precursor for batch fabrication of microsystems” ; Thin Solid Films (ISSN: 00406090), vol. 493, num. 1-2, p. 6-12 ; (2005).

86    P. Jeanneret, J. Busto, J. -L. Vuilleumier, A. Geiser, V. Zacek, H. Keppner, R. de Oliveira
Performance of a new Micromegas detector, with woven wire mesh, in CF4
Nucl. Instr. Meth. Phys. Research Sec. A: Accelerators, Spectrometers, Detectors and Associated Equipment, A500; pp. 133-143; (2003).

85    A. Kuoni, C. Quinche, M. Boillat, H. Keppner, N. de Rooij,
« A high insulating thin film ZnO piezoelectric actuator on a Polyimide substrate »
The 16th European Conference on Solid-State Transducers; (2002).
84    P. Jeanneret, J. Busto, A. Geiser, J-L. Vuilleumier, H. Keppner, R. de Oliveira ; « Low energy physics with with a TPC, LEM, GEM and Micromegas »a TPC, LEM, GEM and Micromegas »
Conference: Neutrino 2000, At Sudbury Canada, Volume: Nucl. Phys. B. (Proc. Suppl.) Poster P60 p523 2001

83    D. Fischer; D. Ciani, A. Closset, P. Torres, U. Kroll, M. Goetz, P. Pernet, X. Niquille, S. Golay, H. Meier, A. Shah, H. Keppner, A. Haller, « 20cm x 30 cm Amorphous Silicon Solar Modules on Plastic Film Fabricated with the VHF-Technology at High Deposition Rates for Integration onto Building Panels » ; 16th EC Photovoltaic Solar Energy Conference, p. 121-126; (2000).

82    Shah A., Torres P., Tscharner R., Wyrsch N., Keppner H.
Photovoltaic Technology : the case for Thin –Film solar Cells.
Science 285(5427) 692-8 ; (1999).

81 H. Keppner, J. Meier, P. Torres, D. Fischer, A. Shah.
“Microcrystalline silicon and micromorph tandem solar cells”
Appl. Physics A, 69 169-177; (1999).

80    J. Meier, H. Keppner, S. Dubail, U. Kroll and P. Torres et al. Micromorph Single-Junction and Micromorph Tandem Thin Film Silicon Solar Cells.
MRS Symp., Vol. 507, p. 139-144; (1998).

79    J. Meier, H. Keppner, S. Dubail, Y. Ziegler and L. Feitknecht et al. “Microcrystalline and Micromorph Thin-Film Silicon Solar Cells”
2nd World Conference on Photovoltaic Energy Conversion, vol. I, p. 375-380; (1998).

78    J. Meier, S. Dubail, J. Cuperus, U. Kroll, R. Platz, P. Torres, J. A. Anna Selvan, P. Pernet, N. Beck, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, A. Shah “Recent progress in micromorph solar cells”
J. Non-Crystall. Solids, 227-230; pp. 1250-1256; (1998).

77    P. Torres, U. Kroll, H. Keppner, J. Meier and E. Sauvain et al. “Deposition of Thin-Film Silicon for Photovoltaics: Use of VHF-GD and OES” Progress in Plasma Processing of Materials - 5th European Conference on Thermal Plasma Processes, p. 855-860 (1998).

76    M. Goerlitzer, P. Torres, N. Beck, N. Wyrsch, H. Keppner, J. Pohl, A. Shah
Structural properties and electronic transport in intrinsic microcrystalline silicon deposited by the VHF-GD technique.
J. Non-Crystall. Solids, 227-230; pp. 996-1000; (1998).

75    H. Keppner, D. Fischer, J. Meier, U. Kroll, N. Beck, Y. Ziegler, Ch. Hof, R. Platz and A. Shah,
"Low bandgap amorphous silicon top cells for micromorph tandems: results from hot-wire and plasma CVD";
Technical digest of the 11th Sunshine Workshop on Thin Film Solar Cells, Shinjuku, Tokyo; pp. 35-42. (1998).

74    O. Kluth, A. Loffl,S. Wieder, C. Beneking, W. Appenzeller, L. Houben, B. Rech, H. Wagner, S. Hoffmann-Eifert, R. Waser, J.A. anna Selvan, H. Keppner« Texture etched Al-doped ZnO: A new material for enhanced light trapping in thin film solar cells »; Photovoltaic specialist’s conference DOI: 10.1109/PVSC.1997.654189 · Source: IEEE Xplore ; «(1997).

73    H. Keppner, M. Götz,
"Plasmatechnik im Dienste eines rationellen Energieeinsatzes",
Bulletin SEV/VSE; Vol. 23, pp. 11-15. (1997).

72    N. Pellaton Vaucher, B. Rech, D. Fischer, S. Dubail, M. Goetz, H. Keppner, C. Beneking, O. Hadjadj, V. Shklover, A. Shah,
"Controlled Nucleation of Thin Microcrystalline Layers for the Recombination Junction in a-Si Stacked Cells",
Solar Energy Mater. Solar Cells, 49; pp. 27-33; (1997).

71    J. Meier, S. Dubail, R. Platz, P. Torres, U. Kroll, J. A. Anna Selvan, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, R. Flückiger, A. Shah, V. Shklover, K. -D. Ufert
Towards high-efficiency thin-film silicon solar cells with the “micromorph” concept
Solar Energy Mater, Solar Cells, 49; pp. 35-44; (1997).

70    J. Meier, P. Torres, R. Platz, S. Dubail, U. Kroll, J.A. Anna Selvan, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, A. Shah, K.-D. Ufert,
"High Efficiency Thin-Film Solar Cells by the "Micromorph" Concept",
Solar Energy Materials and Solar Cells, (1997).

69    U. Kroll, A. Shah, H. Keppner, J. Meier, P. Torres, D. Fischer,
"Potential of VHF-Plasmas for Low-Cost Production of a-Si:H Solar Cells",
Solar Energy Mater. Solar Cells; Vol. 48, pp. 343-350. (1997).

68    A. Shah, J. Meier, P. Torres, U. Kroll, D. Fischer, N. Beck, N. Wyrsch, H. Keppner,
"Recent Progress in Microcrystalline Solar Cells",
Proc. 26th IEEE Photovoltaic Specialists Conference, Anaheim, CA, (1997).

67    P. Torres, J. Meier, U. Kroll, N. Beck, H. Keppner, A. Shah, U. Malang,
"Fast Deposited Microcrystalline Silicon Solar Cells",
Proc. 26th IEEE Photovoltaic Specialists Conference, Anaheim, CA, September-October (1997).

66    P. Torres, H. Keppner, J. Meier, U. Kroll, N. Beck, A. Shah,
"Fast Deposition of µc-Si:H by Restrictive Dilution and Enhanced HF-Power",
Rapid Research Notes: Physica Status Solid; Vol. 97-039. (1997).

65    P. Pernet, M. Goetz, H. Keppner and A. Shah; “Growth of Thin µc-Si:H on Intrinsic a-Si:H for Solar Cells Application”; MRS Symp., vol. 452, p. 889-894; (1997).

64    P. Pernet, R. Felder, M. Goetz, H. Keppner, D. Fischer, A. Shah,
"Optimization of Amorphous Silicon Solar Cells on Polymer Film Substrates",
Proc. 14th EC Photovoltaic Solar Energy Conference, Barcelona, (1997).

63    D. Fischer, H. Keppner, U. Kroll, P. Torres, J. Meier, R. Platz, S. Dubail, J. A. Anna Selvan, N. Pellaton Vaucher, Y. Ziegler, R. Tscharner, Ch. Hof, N. Beck, M. Goetz, P. Pernet, M. Goerlitzer, N. Wyrsch, J. Vuille, J. Cuperus, A. Shah, "Recent Progress of the "Micromorph" TANDEM Solar Cells",
Proc. 14th EC Photovoltaic Solar Energy Conference, Barcelona; (1997).

62    H. Keppner, U. Kroll, P. Torres, M. Goetz, J. Meier,
"Process Enhancement of Hydrogen-Plasma Treatment by Argon",
Zeitschrift für Schweizerische Archäologie und Kunstgeschichte, Vol. 54, pp. 25-28. (1997).

61    J. A. Anna Selvan, H. Keppner, U. Kroll, J. Cuperus, A. Shah, T. Adatte, N. Randall,
"The Fiber Texture Growth and the Surface Roughness of ZnO Thin Films",
Proc. MRS Symp., Spring Meeting, San Francisco, (1997).
60    M. Goetz, P.Torres, P. Pernet, J. Meier, D. Fischer, H. Keppner, A. Shah,
"n-i-p Micromorph Solar Cells on Aluminium Substrates",
Proc. MRS Symp., Fall Meeting, December 1996, Boston; Vol. 452, pp. 877-882. (1997).

59    M. Goerlitzer, N. Beck, P. Torres, U. Kroll, H. Keppner, J. Meier, J. Köhler, N. Wyrsch, A. Shah,
"Electronic Transport and Structure of Microcrystalline Silicon Deposited by the VHF-GD Technique",
Proc. MRS Symp., Spring Meeting, San Francisco, (1997).

58    P. Pernet, M. Goetz, H. Keppner, A. Shah,
"Growth of Thin
µc-Si:H on Intrinsic a-Si:H for Solar Cells Application",
Proc. MRS Symp., Fall Meeting, Dec. 1996, Boston; Vol. 452, p. 889. (1997).

57    P. Torres, J. Meier, M. Goetz, N. Beck, U. Kroll, H. Keppner, A. Shah,
"Microcrystalline Silicon Solar Cells at Higher Deposition Rates by the VHF-GD",
Proc. MRS Symp., Fall Meeting, Dec. 1996, Boston, Vol. 452, p. 883. (1997).

56    P. Torres, J. Meier, R. Flückiger, H. Keppner, A. Shah,
"Enlarged Parameter Space by Use of VHF-GD for Deposition of Thin
Type µc-Si:H Films",
Proc. MRS Symp., Fall Meeting, December 1996, Bosto; Vol. 452, pp. 767-772. (1997).

55    H. Keppner, P. Torres, J. Meier, R. Platz, D. Fischer, U. Kroll, N. Beck, S. Dubail, J. A. Anna Selvan, N. Pellaton Vaucher, M. Goerlitzer, Y. Ziegler, R. Tscharner, Ch. Hof, M. Goetz, P. Pernet, N. Wyrsch, J. Vuille, J. Cuperus, A. Shah, J. Pohl, "The "Micromorph" cell: a New Way to High-Efficiency-Low-Temperature Crystalline Silicon Thin-Film Cell Manufacturing ?",
Proc. MRS Symp., Fall Meeting, Dec. 1996, Boston 7, Vol. 452, p. 865. (1997).

54    H. Keppner, U. Kroll, P. Torres, J. Meier, D. Fischer, A. Shah,
"Scope of VHF Plasma Deposition for Thin-Film Silicon Solar Cells",
Technical Digest of the 8th Workshop on Quantum Solar Energy Conversion, Rauris, Austria, pp. 39-40. (1996).

53    M. Goetz; H. Keppner, P. Pernet, W. Hotz, and A. Shah; „Contamination Problems of Amorphous Silicon N-I-P Solar Cells on Metal Substrates“; MRS Symp., Vol. 426, p. 89-94; (1996).

52    H. Keppner, U. Kroll, P. Torres, J. Meier, R. Platz, D. Fischer, N. Beck, S. Dubail, J. A. Anna Selvan, N. Pellaton Vaucher, M. Goerlitzer, Y. Ziegler, R. Tscharner, Ch. Hof, M. Goetz, P. Pernet, N. Wyrsch, J. Vuille, J. Cuperus, A. Shah, J. Pohl, "The "Micromorph" cell: a New Way to High-Efficiency-Low-Temperature Crystalline Silicon Thin-Film Cell Manufacturing ?",
AIP Conference Proc. NREL/SNL PV Program Review Meeting, Lakewood, CO; Vol. 394, pp. 271-281. (1996).

51    J. Meier, P. Torres, R. Platz, S. Dubail, U. Kroll, J.A. Anna Selvan, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, A. Shah,
"Intrinsic Microcrystalline Silicon Material (µc-Si:H) for Thin Film Solar Cells",
Technical Digest of the 10th "Sunshine" Workshop on Thin Film Solar Cells, Tokyo; pp. 9-17. (1996).

50    J. Meier, P. Torres, R. Platz, S. Dubail, U. Kroll, J.A. Anna Selvan, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, A. Shah, K.-D. Ufert,
"High Efficiency Thin-Film Solar Cells by the "Micromorph" Concept",
Technical Digest of the 9th PVSEC, Miyazak; pp. 653-654. (1996).

49    N. Pellaton, S. Vaucher, B. Rech, D. Fischer, S. Dubail, M. Goetz, H. Keppner, C. Beneking, O. Hadjadj, V. Shklover, A. Shah,
"Controlled Nucleation of Thin Microcrystalline Layers for the Recombination Junction in a-Si Stacked Cells",
Technical Digest of the 9th PVSEC, Miyazaki; pp. 651-652. (1996).

48    A. Shah, U. Kroll, H. Keppner, J. Meier, P. Torres, D. Fischer,
"Potential of VHF-Plasmas for Low-Cost Production of a-Si:H Solar Cells",
Technical Digest of the 9th PVSEC, Miyazaki; pp. 267-270. (1996).

47    P. Torres, J. Meier, R. Flückiger, U. Kroll, J. Anna Selvan, H. Keppner, A. Shah, S.D. Littlewood, I.E. Kelly, P. Giannoulès,
"Device Grade Microcrystalline Silicon Owing to Reduced Oxygen Contamination",
Appl. Phys. Lett., September 1996, Vol. 69, pp. 1373-1375. (1996).

46    H. Keppner, U. Kroll, P. Torres, J. Meier, D. Fischer, M. Goetz, R. Tscharner, A. Shah,
"Scope of VHF Plasma Deposition for Thin-Film Silicon Solar Cells",
Proc. 25th IEEE Photovoltaic Specialists Conference, Washington D.C.; pp. 669-672. (1996).

45    D. Fischer, S. Dubail, J. A. Anna Selvan, N. Pellaton Vaucher, R. Platz, Ch. Hof, U. Kroll, J. Meier, P. Torres, H. Keppner, N. Wyrsch, M. Goetz, A. Shah, K.-D. Ufert,
"The Micromorph Solar Cell: Extending a-Si:H Technology towards Thin Film Crystalline Silicon",
Proc. 25th IEEE Photovoltaic Specialists Conference, Washington D.C.; pp. 1053-1056. (1996).

44    D. Link, H. Keppner, P. Chabloz, A. Shah, J.-F. Germond, J.-M. Haefliger, Y. Pochon, G. Frosio,
"A new Type of Cylindrical a-Si:H X-Ray Detector",
Proc. MRS Symp., Spring Meeting, San Francisco, April 1996, Vol. 420, p. 141. (1996).

43    J.A. Anna Selvan, H. Keppner, A. Shah,
"The Growth of Surface Textured Aluminium Doped ZnO Films for a-Si:H Solar Cells by RF-Magnetron Sputtering at Low Temperature",
Proc. MRS Symp., Spring Meeting, San Francisco; Vol. 426, p. 497. (1996).

42    J. Meier, P. Torres, R. Platz, S. Dubail, U. Kroll, J.A. Anna Selvan, N. Pellaton-Vaucher, Ch. Hof, D. Fischer, H. Keppner, A. Shah, K.-D. Ufert, P. Giannoulès, J. Köhler,
"On the Way towards High-Efficiency Thin Film Silicon Solar Cells by the 'Micromorph' Concept",
Proc. MRS Symp., Spring Meeting, San Francisco, April 1996, Vol. 420, p. 3. (1996).

41    P. Chabloz, H. Keppner, D. Fischer, D. Link and A. Shah,
"Amorphous Silicon p-i-n diodes, deposited by the VHF-GD process: new experimental results".
J. Non-Crystall. Solids , 198-200; pp. 1159-1162 ; (1996).

40    M. Götz, H. Keppner, R. Tscharner, W. Hotz, A. Shah, "Aluminium-Fassadenelemente mit direkt abgeschiedenen amorphen Siliziumsolarzellen", Proc. Schweizer Photovoltaikseminar, Fribourg, (1995).

39    U. Kroll, J. Meier, H. Keppner, S.D. Littlewood, I. E. Kelly, P. Giannoulès, A. Shah, "Origins of Atmospheric Contaminations in Amorphous Silicon prepared by Very High Frequency (70 MHz) Glow Discharge", J. Vac. Sci. Technol. A , 13 (6) pp. 2742-2746; (1995).

38    J. Meier, S. Dubail, D. Fischer, J. Anna Selvan, N. Pellaton Vaucher, R. Platz, Ch. Hof, R. Flückiger, U. Kroll, N. Wyrsch, P. Torres, H. Keppner and A. Shah. "The "Micromorph" Solar Cell: A New Way to high Efficiency Thin Film Solar Cells" Proc. 13th EC Solar Energy Conference Nice; pp 1445-1450. (1995).

37   P. Torres, R. Flückiger, J. Meier, H. Keppner, F. Finger, and A. Shah
"Very Low-Temperature Epitaxial Growth of
type Silicon for Solar Cells" Proc. 13th EC Solar Energy Conference Nic,; pp 1638-1641. (1995).

36   A. Shah, R. Platz, H. Keppner
"Thin-Film Silicon Solar Cells: A Review and Selected Trends" Solar Energy Materials and solar Cells,
38 pp. 501-520, (1995).

35   H. Keppner, U. Kroll, J. Meier and A. Shah,
"Very High Frequency Glow-Discharge: Plasma- and Deposition Aspects" Solid State Phenomena,
Vols. 44-46 pp. 97-126, (1995).

34    U. Kroll, J. Meier, H. Keppner, A. Shah, S. D. Littlewood, I. E. Kelly, P. Giannoulès,
"Origin and Incorporation Mechanism for Oxygen Contaminants in a‑Si:H and µc-Si:H Films prepared by the Very High Frequency (70 MHz) Glow Discharge Technique",
Proceedings of the MRS Symp., San Francisco CA, vol. 377, pp. 39-44; (1995).

33    J. Meier, R. Flückiger, H. Keppner, and A. Shah,
"Complete Microcrystalline p-i-n Solar Cell-Crystalline or Amorphous Cell Behavior", Appl. Phys. Lett.
65(7), p. 860 (1994).

32   P. Chabloz, H. Keppner, D. Fischer, N. Wyrsch, and A. Shah,
"Thick a-Si:H p-i-n Diodes, produced by the VHF-GD Process: Spectral Response for Visible/Infrared Light and Current Transient", Proc. MRS. Symp., San Francisco, 336, p. 879, (1994).

31   J. Meier, S. Dubail, R. Flückiger, D. Fischer, H. Keppner and A. V. Shah,
"Intrinsic Microcrystalline Silicon (µc-Si:H)- a Promising New Thin Film Solar Cell Material"
Proc. 1st IEEE World Conference on Photovoltaic Energy Conversion, Hawaii, (USA), p. 409, (1994).

30    A. Weber, H. von Känel, M. Götz, H. Keppner, and A. Shah,
"Amorphous Zinc Phosphide / Microcrystalline silicon Solar Cells"
Proc. 12th EC Solar Energy Conference, Amsterdam; pp. 1261-1263. (1994).

29    P. Torres, H. Keppner, R. Flückiger and A. Shah,
"Passivation of Crystalline Silicon Solar Cell Wafers by Amorphous and Microcrystalline Silicon Layers deposited by VHF-GD"
Proc. 12th EC Solar Energy Conference, Amsterdam; pp. 1237-1240. (1994).

28    J.Meier, R. Flückiger, H. Keppner, A. Shah,
"Microcrystalline silicon (µc-Si:H) P-I-N Solar Cells prepared by the Very High Frequency Glow-Discharge.
Proc. 12th EC Solar Energy Conference, Amsterdam; pp. 1237-1240. (1994).

27    H. Keppner, P. Torres, R. Flückiger, J. Meier, A. Shah, C. Fortmann, P. Fath, G. Willeke, K. Happle, H. Kiess; "Passivation Properties of Amorphous and Microcrystalline Silicon Layers deposited by VHF-GD doe Crystalline silicon Solar Cells"
Solar Energy Mater. Solar Cells 34, p. 201 (1994)

26    U. Kroll, Y. Ziegler, J. Meier, H. Keppner, and A. Shah, "More insight into the VHF-Glow Discharge by
Plasma Impedance Measurements" Proc. MRS Symp., 336, p. 115, (1994).

25    H. Keppner, P. Torres, R. Flückiger, J. Meier, A. Shah, C.M. Fortmann, P. Fath, G. Willeke, K. Happle, H. Kiess, "Passivation Properties of Amorphous and Microcrystalline Silicon Layers Deposited by VHF-GD for Crystalline Silicon Solar Cells", Technical Digest of the 7th International PVSEC, Nagoya Japan (1993).

24    R. Flückiger, J. Meier, H. Keppner, M. Götz, and A. Shah, “Preparation of Undoped and Doped Microcrystalline Silicon (µc-Si:H) by VHF-GD for p-i-n Solar Cells. Proc. 23 th IEEE Photovoltaic Specialists Conference, Louisville (1993).

23    N. Wyrsch, H. Keppner, N. Pellaton, Y. Ziegler, A. Shah,
"Non Uniform Degradation of a-Si:H Solar Cells", Proc. 11th EC Photovoltaic Solar Energy Conference, Montreux, p. 742; (1992).

22    R. Flückiger, J. Meier, H. Keppner, U. Kroll, A. Shah, O. Greim, M. Morris, J. Pohl, P. Hapke, R. Carius, "Microcrystalline Silicon prepared with the Very High Frequency Glow Discharge Technique for p-i-n Solar Cell Application",
Proc. 11th EC Photovoltaic Solar Energy Conference, Montreux, p. 617; (1992).

21    R. Tscharner, N. Pellaton, Y. Ziegler, D. Fischer, H. Keppner, A. Shah, Ch. Hollenstein, A. Howling, J.L. Dorier, "Fast Powder-Free Deposition of high Quality Amorphous Silicon Solar Cells",
Proc.11th EC Photovoltaic Solar Energy Conference, Montreux, 1992, p. 621; (1992).

20    U. Kroll, F. Finger, J. Dutta, H. Keppner, A. Shah, A. Howling, J.-L. Dorier, Ch. Hollenstein,
"Microstructure, Optoelectronic Properties and Saturated Defect Density of a-Si:H prepared in VHF-Glow Discharge using Ar and Xe Dilution" Proc. MRS Symp., San Francisco CA, Vol. 258, pp. 135-140; (1992).

19    D. Fischer, N. Pellaton, H. Keppner, A. Shah, C.M. Fortmann,
"Room Temperature Recovery of Light-Induced Degradation in a-Si:H Solar Cells" Proc. MRS Symp., San Francisco CA, Vol. 258, pp. 893-897; (1992).

18    P. Chabloz, H. Keppner, V. Beartschi, A. Shah, D. Chatellard, J.-P. Egger, M. Denoréaz, E. Jeannet, J.-F. Germond, R. Vuilleumier, "X-Ray Detectors based on Thick a-Si:H Layers Deposited by the VHF-GD Process" Proc. MRS Symp., San Francisco CA, Vol. 258, pp. 1057-1062; (1992).

17    H. Keppner, P. Fath, D. Fischer, N. Pellaton, A. Mettler, R. Tscharner, A. Shah
"Saturation Behavior of Solar Cell Efficiency due to Light Soaking under Diffrent Wavelengths for a-Si:H Cells made by High Deposition Rate VHF-GD" Technical Digest of the 6th PVSEC, New Delhi, pp. 615-619; (1992).

16    R. Tscharner, D. Fischer, H. Keppner, A.V. Shah, A.A. Howling, J.L. Dorier, Ch. Hollenstein,
"Fast Deposition of High Quality Amorphous Silicon Solar Cells without Powder Formation"
Technical Digest of the 6th PVSEC, New Delhi, pp. 311-316; (1992).

15    H. Keppner, P. Chabloz, D. Fischer, A. Mettler, R. Tscharner, A.V. Shah, Ch. Rossier,
"Continuous Monitoring of VHF-GD Deposited pin Solar Cells during Uniform Degradation till Saturation",
Proc. 10th EC Photovoltaic Solar Energy Conference, Lisbon, p.205; (1991).

14    D. Fischer, H.Keppner, F. Finger, K. Prasad, A.V. Shah,
"VHF Plasma Deposition for Low-Cost Solar Cells",
Proc. 10th EC Photovoltaic Solar Energy Conference, Lisbon, p. 201; (1991).

13    J. Meier, G. Kragler, G. Willeke, E. Bucher , H. Keppner, D. Fischer, V. Viret, A. V. Shah,
"Open Circuit Voltage Enhancement in MIS Solar Cells by Thin Plasma-Grown Tunneling Oxides",
Proc. 10th EC Photovoltaic Solar Energy Conference, Lisbon, April p. 192; (1991).

12    G. Willeke, R. Fischer, E. Bucher, K. Prasad, H. Keppner, F. Finger, A. Shah,
"Total Yield Photoemission Study of Heavily n- and p-doped GD-µc-Si",
Proc. POLYSE ' 90 , Schwäbisch Hall, Juli (1990).

11    S. Bausch, B. Sailer, H. Keppner, G. Willeke, E. Bucher,
"Preparation of Pyrite Films by Plasma-assisted Sulfurization of Thin Iron Films",
Appl. Phys. Lett., Vol. 57 (1), pp. 25-27; (1990).

10    D. Fischer, R. Tscharner, Y. Ziegler, H. Keppner, A.V. Shah,
"Preisgünstige Herstellung von Solarzellen aus amorphem Silizium mittels VHF-Plasmaabscheidung",
Proc. SOFAS Fachtagung "Photovoltaik-Nutzung", Zürich, Januar 1p. 93; (1990).

9     J. Meier, H. Berner, M.Simon, G. Kragler, E. Bucher , H. Keppner, Y. Ziegler, H. Curtins, A. V. Shah,
"Open Circuit Voltage Enhancement by Passivation of a-Si:H Surfaces",
Third International Conference on Surface Modification Technologies, Neuchâtel, p. 841; (1989).

8     D. Fischer, R. Tscharner, Y. Ziegler, H. Keppner, A.V. Shah,
"Amorphous Silicon Solar Cells fabricated by High Deposition Rate VHF Glow Discharge Process",
Proc. 9th EC Photovoltaic Solar Energy Conference, Freiburg, September, pp. 995-997; (1989).

7     B. Leutz, H. Keppner, V. Viret, D. Fischer, E. Sauvain., A.V. Shah,
"High Rate Deposition of a-Si:H Films for Optoelectronic Detectors by VHF-GD",
Proceedings of the 1st International Conference on Amorphous Semiconductor Technology (ICAST), Asheville; J. Non-Crystall. Solids, Vol. 115, pp. 93-95; (1989).
6     J. Meier, H. Keppner, E. Bucher, P. Munz, H. Curtins, A.V. Shah, S. Paasche, W.H. Bloss,
"New Stable Microwave Plasma Passivated a-Si MIS Cells with High Open Circuit Voltage",
Appl. Phys., A 46, , pp. 31-34; (1988).

5     J. Meier, H. Keppner, G. Kragler, E. Bucher, H. Curtins, A.V. Shah, S. Paasche, W.H. Bloss,
"Barrier Enhancement by Passivation of a-Si:H Surfaces",
Proc. 8th EC Photovoltaic Solar Energy Conference, Florence, May Vol 1, pp. 924-928; (1988).

4     B. Sailer, H. Keppner, and E. Bucher,
“Preparation and in situ I-V Monitoring of MIS Solar Cells: a simple Tool for the Investigation of Barrier Films”.
Proc. 8th EC Photovoltaic Solar Energy Conference, Florence, May Vol 1, p. 1461; (1988).

3     H. Keppner, Dissertation,
"Herstellung und Untersuchung von MIS Solarzellen mit gesputtertem Barrierenmetall und Untersuchung der Barrierenbildung bei in situ Präparation im UHV"
Kosnstanzer Dissertationen, 147, Hartung-Gorre Verlag Konstanz, ISBN 3-89191-086-X (1986).

2     H. Keppner, P. Munz, C. Maier, and E. Bucher
“Characterization of Defects due to low Voltage Thin Film Sputter Deposition by Means of the MIS Structure”.
Vacuum, Vol 36, 11/12 pp 905 (1986).

1     H. Keppner, P. Munz, E. Bucher,
Proc. 18 IEEE Photovoltaic Specialist’s Conferenc