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

页码：716 / 718

页数：3