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Enhancement of Photoluminescence from Organic and Inorganic Surface Passivated ZnS Quantum Dots

Published online by Cambridge University Press:  21 March 2011

Hatim Mohamed El-Khair ,
Ling Xu ,
Mingha Li ,
Yi Ma ,
Xinfan Huang  and
Kunji Chen
Hatim Mohamed El-Khair
Affiliation:
National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University1, Nanjing 210093, China
Ling Xu
Affiliation:
National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University1, Nanjing 210093, China
Mingha Li
Affiliation:
National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University1, Nanjing 210093, China
Yi Ma
Affiliation:
National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University1, Nanjing 210093, China
Xinfan Huang
Affiliation:
National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University1, Nanjing 210093, China
Kunji Chen
Affiliation:
National Laboratory of Solid State Microstructures and Department of PhysicsNanjing University1, Nanjing 210093, China
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Abstract

ZnS quantum dots (QDs) chemically synthesized in PVP stabilizing medium have been coated with Zn(OH)2, SiO2and polystyrene (PS) shells as inorganic and organic passivation agents. to synthesize ZnS/Zn(OH)2, ZnS/SiO2and ZnS/PS QDs. PL properties of inorganically passivated ZnS/Zn(OH)2 and ZnS/SiO2 had reported band edge enhancement of 8-10 times, while organically passivated ZnS/PS QDs exhibit tremendous enhancement of band edge emission as much as 10-15 times,. Therefore inorganic and organic coating can passivate trap states of different energies on the surface of ZnS QDs.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 667: Symposium G – Luminescence and Luminescent Materials , 2001 , G3.1
Copyright
Copyright © Materials Research Society 2001

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