Dynamics of photogenerated holes in nanocrystalline α-Fe2O3 electrodes for water oxidation probed by transient absorption spectroscopy

被引：251
|
作者：
Pendlebury, Stephanie R. [1 ]
Barroso, Monica [1 ]
Cowan, Alexander J. [1 ]
Sivula, Kevin [2 ]
Tang, Junwang [3 ]
Graetzel, Michael [2 ]
Klug, David [1 ]
Durrant, James R. [1 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
[2] Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland
[3] UCL, Dept Chem Engn, London WC1E 7JE, England
来源：
CHEMICAL COMMUNICATIONS | 2011年 / 47卷 / 02期
基金：
英国工程与自然科学研究理事会;
关键词：
CARRIER DYNAMICS; SOLAR-CELLS; PHOTO; FILMS;
D O I：
10.1039/c0cc03627g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Transient absorption spectroscopy on the mu s-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.
引用
收藏
页码：716 / 718
页数：3
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