Single-molecule fluorescence spectroscopy studies of photo-induced electron transfer between CdSe/ZnS quantum dots and fullerene

被引：0

作者：

Xu, Zhihua ^{[1
]}

Cotlet, Mircea ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

SINGLE MOLECULE SPECTROSCOPY AND IMAGING III | 2010年 / 7571卷

关键词：

quantum dots; photoinduced electron transfer; fullerene; single molecule spectroscopy; fluorescence lifetime; SOLAR-CELLS; COMPLEXES; DYNAMICS; FILMS;

D O I：

10.1117/12.845922

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Photo-induced electron transfer in CdSe/ZnS semiconductor quantum dot-fullerene conjugates was investigated by single molecule fluorescence spectroscopy. The average rate for photoinduced electron transfer is estimated around 10(8)s(-1). Quenching by electron transfer is observed in the "on" state and it manifests both as reduced fluorescence intensity and as shortening in fluorescence lifetime. As a result, the electron transfer changes the on/off dynamics of the fluorescence intensity of individual quantum dots.

引用

页数：8

共 11 条

[1] Functional PEG-modified thin films for biological detection [J].

Anderson, Aaron S. ;

Dattelbaum, Andrew M. ;

Montano, Gabriel A. ;

Price, Dominique N. ;

Schmidt, Jurgen G. ;

Martinez, Jennifer S. ;

Grace, W. Kevin ;

Grace, Karen M. ;

Swanson, Basil I. .

LANGMUIR, 2008, 24 (05) :2240-2247

[2] Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots [J].

Ellingson, RJ ;

Beard, MC ;

Johnson, JC ;

Yu, PR ;

Micic, OI ;

Nozik, AJ ;

Shabaev, A ;

Efros, AL .

NANO LETTERS, 2005, 5 (05) :865-871

[3] Photoinduced ultrafast electron transfer from CdSe quantum dots to re-bipyridyl complexes [J].

Huang, Jier ;

Stockwell, Dave ;

Huang, Zhuangqun ;

Mohler, Debra L. ;

Lian, Tianquan .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (17) :5632-+

[4] Hybrid nanorod-polymer solar cells [J].

Huynh, WU ;

Dittmer, JJ ;

Alivisatos, AP .

SCIENCE, 2002, 295 (5564) :2425-2427

[5] Intermittent electron transfer activity from single CdSe/ZnS quantum dots [J].

Issac, Abey ;

Jin, Shengye ;

Lian, Tianquan .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (34) :11280-+

[6] Electron Transfer Dynamics from Single CdSe/ZnS Quantum Dots to TiO2 Nanoparticles [J].

Jin, Shengye ;

Lian, Tianquan .

NANO LETTERS, 2009, 9 (06) :2448-2454

[7] Spectroscopy and hot electron relaxation dynamics in semiconductor quantum wells and quantum dots [J].

Nozik, AJ .

ANNUAL REVIEW OF PHYSICAL CHEMISTRY, 2001, 52 :193-231

[8] Quantum dot solar cells.: Harvesting light energy with CdSe nanocrystals molecularly linked to mesoscopic TiO2 films [J].

Robel, I ;

Subramanian, V ;

Kuno, M ;

Kamat, PV .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (07) :2385-2393

[9] High efficiency carrier multiplication in PbSe nanocrystals: Implications for solar energy conversion [J].

Schaller, RD ;

Klimov, VI .

PHYSICAL REVIEW LETTERS, 2004, 92 (18) :186601-1

[10] Blinking statistics in single semiconductor nanocrystal quantum dots [J].

Shimizu, KT ;

Neuhauser, RG ;

Leatherdale, CA ;

Empedocles, SA ;

Woo, WK ;

Bawendi, MG .

PHYSICAL REVIEW B, 2001, 63 (20)

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