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    Université de Neuchâtel

    Microcrystalline silicon and micromorph tandem solar cells

    Keppner, H. ; Meier, Johannes ; Torres, P. ; Fischer, D. ; Shah, A.

    In: Applied Physics A: Materials Science & Processing, 1999, vol. 69, no. 2, p. 169-177

    “Micromorph” tandem solar cells consisting of a microcrystalline silicon bottom cell and an amorphous silicon top cell are considered as one of the most promising new thin-film silicon solar-cell concepts. Their promise lies in the hope of simultaneously achieving high conversion efficiencies at relatively low manufacturing costs. The concept was introduced by IMT Neuchâtel, based on the...

    Université de Neuchâtel

    Thin-film silicon detectors for particle detection

    Wyrsch, Nicolas ; Dunand, S. ; Miazza, C. ; Shah, A. ; Anelli, G. ; Despeisse, M. ; Garrigos, A. ; Jarron, P. ; Kaplon. J. ; Moraes, D. ; Commichau, S. C. ; Dissertori, G. ; Viertel, G. M.

    In: Physica status solidi (c), 2004, vol. 1, no. 5, p. 1284-1291

    Integrated particle sensors have been developed using thin-film on ASIC technology. For this purpose, hydrogenated amorphous silicon diodes, in various configurations, have been optimized for particle detection. These devices were first deposited on glass substrates to optimize the material properties and the dark current of very thick diodes (with thickness up to 50 μm). Corresponding diodes...

    Université de Neuchâtel

    Fast deposition of μc-Si:H by restrictive dilution and enhanced HF-power

    Torres, P. ; Keppner, H. ; Meier, Johannes ; Kroll, U. ; Beck, N. ; Shah, A.

    In: Physica status solidi. A. Applied research, 1997, vol. 163, no. 2, p. R9-R10

    The purpose of this paper is to demonstrate that an enhanced deposition rate in excess of 10Å/s with reasonnable cell performances is however, indeed possible while remaining within the Very High Frequency-Glow Discharge (VHF-GD) deposition technique (at plasma excitation frequencies of 70 to 130MHz).