期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 42, 页码 35869-35875出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b04900
关键词
photoelectrochemistry; charge carrier lifetime; TRMC; ultrafast spectroscopy; combinatorial materials science; Cr-Fe-Al-O
资金
- DFG [LU1175/10-1, LU1175/10-2]
- BMBF through the Me0x4H2 project [03SF0478A]
- International Max Planck Research School for Surface and Interface Engineering (IMPRS-SurMat)
The effect of compositional variation on charge carrier lifetimes of Cr1Fe0.84Al0.16O3) a promising material for solar water splitting recently identified using combinatorial materials science, is explored using ultrafast time-resolved optical reflectance. The transient signal can be described by a biexponential decay, where the shorter time constant varies over 1 order of magnitude with changing Cr content while the longer one stays constant. Intrinsic performance limitations such as a low charge carrier mobility on the order of 10(-3) Fe cm(2)/(Vs) are identified. Charge carrier lifetime and mobility are discussed as screening criteria for solar water splitting materials.
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