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Efficiency limiting factors of organic bulk heterojunction solar cells identified by electrical impedance spectroscopy

Abstract:

The current-voltage characteristic and the performance of organic bulk-heterojunction solar cells are very sensitive to small variations in the production steps or environmental influences. In our experiments, we found a large variation of the short-circuit current, which does not correspond to the device thickness as one might expect. The fill factor of some devices is below 25% under illumination, while the best devices have a fill factor of about 70%. Electrical impedance spectroscopy can ...

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
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Journal:
Solar Energy Materials and Solar Cells
Volume:
91
Issue:
5
Pages:
390-393
Publication date:
2007-03-06
DOI:
ISSN:
0927-0248
URN:
uuid:df37c071-40c2-4d00-ba22-fe256f9d6d54
Source identifiers:
405434
Local pid:
pubs:405434

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