Journal Article

FZJ-2014-06121

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png a-Si:H/µc-Si:H tandem junction based photocathodes with high open-circuit voltage for efficient hydrogen production

Urbain, F. (Corresponding Author)FZJ* ; Smirnov, V.FZJ* ; Becker, J. P.FZJ* ; Rau, U.FZJ* ; Finger, F.FZJ* ; Ziegler, J. ; Kaiser, B. ; Jaegermann, W.

2014
MRS Warrendale, Pa.

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Please use a persistent id in citations: http://hdl.handle.net/2128/8106  doi:10.1557/jmr.2014.308

Abstract: Thin film silicon tandem junction solar cells based on amorphous silicon (a-Si:H) and microcrystalline silicon (µc-Si:H) were developed with focus on high open-circuit voltages for the application as photocathodes in integrated photoelectrochemical cells for water electrolysis. By adjusting various parameters in the plasma enhanced chemical vapor deposition process of the individual µc-Si:H single junction solar cells, we showed that a-Si:H/µc-Si:H tandem junction solar cells exhibit open-circuit voltage over 1.5 V with solar energy conversion efficiency of 11% at a total silicon layer thickness below 1 µm. Our approach included thickness reduction, controlled SiH4 profiling, and incorporation of intrinsic interface buffer layers. The applicability of the tandem devices as photocathodes was evaluated in a photoelectrochemical cell. The a-Si:H/µc-Si:H based photocathodes exhibit a photocurrent onset potential of 1.3 V versus RHE and a short-circuit photocurrent of 10.0 mA/cm2. The presented approach may provide an efficient and low-cost pathway to solar hydrogen production.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 111 - Thin Film Photovoltaics (POF2-111) (POF2-111)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2014

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Database coverage:
; ; ; Allianz-Lizenz / DFG ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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