Electrogenerated Chemiluminescence from PbS Quantum Dots

被引：127

作者：

Sun, Liangfeng ^{[1
]}

Bao, Lei ^{[2
,4
,5
]}

Hyun, Byung-Ryool

Bartnik, Adam C. ^{[1
]}

Zhong, Yu-Wu ^{[1
,2
]}

Reed, Jason C. ^{[3
]}

Pang, Dai-Wen ^{[4
,5
]}

Abruna, Hector D. ^{[2
]}

Malliaras, George G. ^{[3
]}

Wise, Frank W. ^{[1
]}

机构：

[1] Cornell Univ, Sch Appl & Engn Phys, Ctr Nanoscale Syst, Ithaca, NY 14853 USA

[2] Cornell Univ, Dept Chem & Chem Biol, Ithaca, NY 14853 USA

[3] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA

[4] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

[5] Wuhan Univ, State Key Lab Virol, Wuhan 430072, Peoples R China

来源：

NANO LETTERS | 2009年 / 9卷 / 02期

基金：

美国国家科学基金会;

关键词：

GALENA LEAD SULFIDE; ELECTROCHEMICAL BEHAVIOR; NANOCRYSTALS; NANOPARTICLES; ASSEMBLIES;

D O I：

10.1021/nl803459b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the first observation of electrogenerated chemiluminescence (ECL) from PbS quantum dots (ODs). Different ECL intensities are observed for different ligands used to passivate the ODs, which indicates that ECL is sensitive to surface chemistry, with the potential to serve as a powerful probe of surface states and charge transfer dynamics in ODs. In particular, passivation of the OD surfaces with trioctylphosphine (TOP) increases ECL intensity by 3 orders of magnitude when compared to passivation with oleic acid alone. The observed overlap of the ECL and photoluminescence spectra suggests a significant reduction of deep surface trap states from the ODs passivated with TOP.

引用

页码：789 / 793

页数：5

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