Abstract
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 cm2/(Vs) are identified. Charge carrier lifetime and mobility are discussed as screening criteria for solar water splitting materials.
Original language | English |
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Pages (from-to) | 35869-35875 |
Number of pages | 7 |
Journal | ACS Applied Materials and Interfaces |
Volume | 10 |
Issue number | 42 |
DOIs | |
State | Published - 24 Oct 2018 |
Externally published | Yes |
Keywords
- Cr-Fe-Al-O
- TRMC
- charge carrier lifetime
- combinatorial materials science
- photoelectrochemistry
- ultrafast spectroscopy