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

Progress of solar cells based on plasma deposited hydrogenated microcrystalline silicon (/spl mu/c-Si:H), as well as on combined a-Si:H//spl mu/c-Si:H stacked "micromorph" solar cells is reported. /spl mu/c-Si:H p-i-n cells with a thickness of 3.6 /spl mu/m, deposited with the use of a gas...

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Published inConference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996 pp. 1053 - 1056
Main Authors Fischer, D., Dubail, S., Selvan, J.A.A., Vaucher, N.P., Platz, R., Hof, Ch, Kroll, U., Meier, J., Torres, P., Keppner, H., Wyrsch, N., Goetz, M., Shah, A., Ufert, K.-D.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1996
Subjects
Absorption
Crystallization
Frequency
Photovoltaic cells
PIN photodiodes
Plasma materials processing
Plasma temperature
Semiconductor thin films
Silicon
Substrates
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Summary:Progress of solar cells based on plasma deposited hydrogenated microcrystalline silicon (/spl mu/c-Si:H), as well as on combined a-Si:H//spl mu/c-Si:H stacked "micromorph" solar cells is reported. /spl mu/c-Si:H p-i-n cells with a thickness of 3.6 /spl mu/m, deposited with the use of a gas-purifier, are shown to have a short-circuit current of over 25 mA/cm/sup 2/, and a stable efficiency of 7.7%. a-Si:H//spl mu/c-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//spl mu/c-Si:H solar cells are discussed. This includes the introduction of a ZnO reflector layer between a-Si:H and /spl mu/c-Si:H component cells, a new concept of which first experimental results are given.
ISBN:0780331664
9780780331662
ISSN:0160-8371
DOI:10.1109/PVSC.1996.564311