Transient mid-IR study of electron dynamics in TiO2 conduction band

被引：21

作者：

Sa, Jacinto ^{[1
]}

Friedli, Peter ^{[1
]}

Geiger, Richard ^{[1
]}

Lerch, Philippe ^{[1
]}

Rittmann-Frank, Mercedes H. ^{[2
]}

Milne, Christopher J. ^{[2
]}

Szlachetko, Jakub ^{[1
,3
]}

Santomauro, Fabio G. ^{[1
]}

van Bokhoven, Jeroen A. ^{[1
,4
]}

Chergui, Majed ^{[2
]}

Rossi, Michel J. ^{[1
]}

Sigg, Hans ^{[1
]}

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[2] Ecole Polytech Fed Lausanne, Lab Spect Ultrarapide, CH-1015 Lausanne, Switzerland

[3] Jan Kochanowski Univ, Inst Phys, PL-25406 Kielce, Poland

[4] ETH, Inst Chem & Bioengn, CH-8093 Zurich, Switzerland

来源：

ANALYST | 2013年 / 138卷 / 07期

关键词：

TITANIUM-DIOXIDE FILMS; NANOCRYSTALLINE TIO2; CHARGE SEPARATION; ABSORPTION-SPECTROSCOPY; INJECTION; NANOPARTICLES; RELAXATION; TRANSPORT; WATER; TIME;

D O I：

10.1039/c3an36595f

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The dynamics of TiO2 conduction band electrons were followed with a novel broadband synchrotron-based transient mid-IR spectroscopy setup. The lifetime of conduction band electrons was found to be dependent on the injection method used. Direct band gap excitation results in a lifetime of 2.5 ns, whereas indirect excitation at 532 nm via Ru-N719 dye followed by injection from the dye into TiO2 results in a lifetime of 5.9 ns.

引用

页码：1966 / 1970

页数：5

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