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Degradation Studies of Colloidal Quantum Dot Light-Emitting Diodes

Published online by Cambridge University Press:  08 March 2011

Jie Liu ,
Chuang Xie ,
Yu Zhang ,
Wenjia Hu ,
Shawn Pickering ,
Guanjun You ,
Andrew Y. Wang  and
Jian Xu
Jie Liu
Affiliation:
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, U.S.A.
Chuang Xie
Affiliation:
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, U.S.A. Ocean NanoTech LLC., 2143 Worth Lane, Springdale, Arkansas 72764, U.S.A. State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
Yu Zhang
Affiliation:
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, U.S.A. State Key Laboratory on Integrated Optoelectronics, and College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China
Wenjia Hu
Affiliation:
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, U.S.A. State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China
Shawn Pickering
Affiliation:
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, U.S.A.
Guanjun You
Affiliation:
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, U.S.A.
Andrew Y. Wang
Affiliation:
Ocean NanoTech LLC., 2143 Worth Lane, Springdale, Arkansas 72764, U.S.A.
Jian Xu
Affiliation:
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, U.S.A.
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Abstract

The degradation mechanism of CdSe/ZnS quantum dots (QDs) light-emitting diodes (LEDs) was investigated with steady-state and time-resolved photoluminescence measurements. Our study reveals that the degradation is associated with the decreasing quantum efficiency of the CdSe/ZnS QDs in the devices. Two mechanisms that cause the efficiency reduction were verified in the experiments: i.e., thermal instability and luminescence quenching.

Keywords

luminescencenanostructureoptoelectronic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1286: Symposium E – Molecular and Hybrid Materials for Electronics and Photonics , 2011 , mrsf10-1286-e03-55
Copyright
Copyright © Materials Research Society 2011

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References

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