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The “micromorph” solar cell: extending a-Si:H technology towards thin film crystalline silicon

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14 Author(s)
Fischer, D. ; Institut de Microtechnique, Neuchatel Univ., Switzerland ; Dubail, S. ; Anna Selvan, J.A. ; Vaucher, N.P.
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Progress of solar cells based on plasma deposited hydrogenated microcrystalline silicon (μc-Si:H), as well as on combined a-Si:H/μc-Si:H stacked “micromorph” solar cells is reported. μc-Si:H p-i-n cells with a thickness of 3.6 μm, deposited with the use of a gas-purifier, are shown to have a short-circuit current of over 25 mA/cm2, and a stable efficiency of 7.7%. a-Si:H/μc-Si:H tandem cells with 13% initial, and with 10% degraded state efficiency are also demonstrated. In addition, methods to further increase the efficiency of combined a-Si:H/μc-Si:H solar cells are discussed. This includes the introduction of a ZnO reflector layer between a-Si:H and μc-Si:H component cells, a new concept of which first experimental results are given

Published in:

Photovoltaic Specialists Conference, 1996., Conference Record of the Twenty Fifth IEEE

Date of Conference:

13-17 May 1996