In:
MRS Proceedings, Springer Science and Business Media LLC, Vol. 1536 ( 2013), p. 105-111
Abstract:
In this contribution, we show that the dominant electroluminescent emission of hydrogenated amorphous silicon ( a -Si:H) thin-film solar cells follows a diode law, whose radiative ideality factor n r is larger than one. This is in contrast to crystalline silicon and Cu(In, Ga)Se 2 solar cells for which n r equals one. As a consequence, the existing quantitative analysis for the extraction of the local junction voltage V j ( r ) from luminescence images fails for a -Si:H solar cells. We expand the existing analysis method, and include the radiative ideality factor n r into the model. With this modification, we are able to determine the local junction voltage V j ( r ) for a -Si:H solar cells and modules. We investigated the local junction voltage V j ( r ) and the radiative ideality factor n r for both initial and stabilized a -Si:H solar modules. Furthermore, we show that the apparent radiative ideality factor is affected by the spectral sensitivity of the used camera system.
Type of Medium:
Online Resource
ISSN:
0272-9172
,
1946-4274
DOI:
10.1557/opl.2013.817
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2013
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