期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 5, 期 10, 页码 8923-8926出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ee22681b
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资金
- U.S. Department of Energy, Office of Basic Energy Sciences, Solar Photochemistry Program [DE-FG02-07ER-15906, DE-FG020-5ER15752]
- NSF Center for Chemical Innovation at Caltech [CHE-0802907]
- NSF through a CAREER Award [DMR-1055762]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0802907] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1055762] Funding Source: National Science Foundation
The spectra and dynamics of photogenerated electrons and holes in excited hematite (alpha-Fe2O3) electrodes are investigated by transient absorption (from visible to infrared and from femto- to microseconds), bias-dependent differential absorption and Stark spectroscopy. Comparison of results from these techniques enables the assignment of the spectral signatures of photogenerated electrons and holes. Under the pulse illumination conditions of transient absorption (TA) measurement, the absorbed photon to electron conversion efficiency (APCE) of the films at 1.43 V (vs. reversible hydrogen electrode, RHE) is 0.69%, significantly lower than that at
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