Electron Transfer Dynamics from Single CdSe/ZnS Quantum Dots to TiO2 Nanoparticles

被引：139

作者：

Jin, Shengye ^{[1
]}

Lian, Tianquan ^{[1
]}

机构：

[1] Emory Univ, Dept Chem, Atlanta, GA 30322 USA

来源：

NANO LETTERS | 2009年 / 9卷 / 06期

基金：

美国国家科学基金会;

关键词：

FLUORESCENCE INTERMITTENCY; CARRIER MULTIPLICATION; CHARGE RECOMBINATION; COLLOIDAL CDS; SOLAR-CELLS; SEMICONDUCTOR; BLINKING; SIZE; INJECTION; CDTE;

D O I：

10.1021/nl9011744

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electron-transfer dynamics from single CdSe/ZnS (core/shell) QDs to TiO2 nanoparticles were studied. Single QDs on TiO2 showed pronounced and correlated fluctuations of fluorescence intensity and lifetime. Compared to QDs on glass, the presence of the interparticle ET pathway on TiO2 led to smaller on-state and larger off-state probability densities, as well as a shortened lifetime of the on-state. The average electron transfer rate from CdSe/ZnS to TiO2 was estimated to be 3.2 x 10(7) s(-1).

引用

页码：2448 / 2454

页数：7

共 77 条

[71] Determination of energetics and kinetics from single-particle intermittency and ensemble-averaged fluorescence intensity decay of quantum dots [J].