Journal Article

FZJ-2016-04179

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Impact of transparent conductive oxide front side texture on the open-circuit voltage of a-Si:H solar cells

Zhang, C. (Corresponding author)FZJ* ; Merdzhanova, T.FZJ* ; Meier, M.FZJ* ; Sommer, N. ; Astakhov, O. (Corresponding author)FZJ*

2016
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/pssa.201532961

Abstract: High efficiency thin-film silicon solar cells require texturing of the front contacts for advanced light management. However, optically favorable textures may be challenging in terms of the electrical performance. Solar cells deposited on very rough front contacts show a reduced open-circuit voltage, Voc, as compared to flat TCOs. This contribution focuses on the impact of rough surfaces on the Voc in a-Si:H solar cells deposited on six different textured front TCOs. With various i-layer thicknesses from 100 to 400 nm the origin of the Voc loss is investigated. Based on our results we propose that the reduction of Voc in a-Si:H solar cells are mainly due to defective regions in the bulk material induced by very rough textures. It is also seen that enlarging the i-layer thickness can improve the Voc of solar cells when grown on very rough textures. By using variable illumination intensity measurements the existence of shunts could be evidenced.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 121 - Solar cells of the next generation (POF3-121) (POF3-121)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2016

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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