瞬态吸收光谱研究用于水氧化的纳米晶 α-Fe2O3 电极中光生空穴的动力学。
Dynamics of photogenerated holes in nanocrystalline α-Fe2O3 electrodes for water oxidation probed by transient absorption spectroscopy.
机构信息
Department of Chemistry, Imperial College London, Exhibition Road, London, UK SW7 2AZ.
出版信息
Chem Commun (Camb). 2011 Jan 14;47(2):716-8. doi: 10.1039/c0cc03627g. Epub 2010 Nov 11.
PMID:21072391
Abstract
Transient absorption spectroscopy on the μs-s time scale is used to monitor the yield and decay dynamics of photogenerated holes in nanocrystalline hematite photoanodes. In the absence of a positive applied bias, these holes are observed to undergo rapid electron-hole recombination. The application of a positive bias results in the generation of long-lived (3 ± 1 s lifetime) photoholes.
摘要
利用微秒时间尺度的瞬态吸收光谱来监测纳米晶赤铁矿光阳极中光生空穴的产率和衰减动力学。在没有正向偏压的情况下，这些空穴会经历快速的电子-空穴复合。施加正向偏压会导致长寿命（3±1 s 寿命）光空穴的产生。
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