Investigation on photoluminescence quenching of CdSe/ZnS quantum dots by organic charge transporting materials

被引：9
|
作者：
Qu Yuqiu [1 ]
Zhang Liuyang [2 ]
An Limin [1 ]
Wei Hong [1 ]
机构：
[1] Heilongjiang Univ, Coll Phys Sci & Technol, Harbin, Peoples R China
[2] Harbin Univ Sci & Technol, Dept Optoelect Informat Sci & Engn, West Campus,POB 130, Harbin 150080, Peoples R China
来源：
MATERIALS SCIENCE-POLAND | 2015年 / 33卷 / 04期
关键词：
quantum dots; charge transporting; photoluminescence quenching; LIGHT-EMITTING-DIODES; SOLAR-CELLS; NANOCRYSTALS; DEPENDENCE; POLYMER; LAYER;
D O I：
10.1515/msp-2015-0120
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of different organic charge transporting materials on the photoluminescence of CdSe/ZnS core/shell quantum dots has been studied by means of steady-state and time-resolved photoluminescence spectroscopy. With an increase in concentration of the organic charge transporting material in the quantum dots solutions, the photoluminescence intensity of CdSe/ZnS quantum dots was quenched greatly and the fluorescence lifetime was shortened gradually. The quenching efficiency of CdSe/ZnS core/shell quantum dots decreased with increasing the oxidation potential of organic charge transporting materials. Based on the analysis, two pathways in the photoluminescence quenching process have been defined: static quenching and dynamic quenching. The dynamic quenching is correlated with hole transporting from quantum dots to the charge transporting materials.
引用
收藏
页码：709 / 713
页数：5
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