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Proceedings Paper

Electroluminescence from doped ZnS nanocrystals/polymer composite systems
Author(s): Yi Yang; Jinman Huang; Shanhua Xue; Yuguang Ma; Shiyong Liu; Jiachong Shen
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Paper Abstract

ZnS, ZnS:Cu and ZnS/CdS nanocrystals were synthesized in polymer matrices with a variety of methods. TEM, absorption spectra and small-angle x-ray scattering studies showed that the particle sizes of ZnS, ZnS:Cu and ZnS/CdS nanocrystals were 3.0, 3.2 and 2.0 nm respectively. Electron diffraction results showed that the ZnS and CdS nanocrystals have the hexagonal structures and Cu ions existed in ZnS with the form of Cu2S. A hole transport material tetraphenylbenzidine (TPB) were also doped into ZnS nanocrystals/polymer to improve the electroluminescent (EL) property of the ZnS nanocrystals. ZnS:Cu, ZnS/CdS and TPB/ZnS nanoparticles/polymer composite as emitters were used to fabricate a single layer structure light-emitting diode between ITO and Al electrodes respectively. The photoluminescence and EL properties of these doped systems were studied. These EL devices had low turn on voltage and the blue electroluminescence from Cu:ZnS and ZnS/CdS and a violet-blue electroluminescence from TPB:ZnS were observed respectively at room temperature under ambient air. The EL mechanism is also discussed.

Paper Details

Date Published: 1 December 1997
PDF: 10 pages
Proc. SPIE 3148, Organic Light-Emitting Materials and Devices, (1 December 1997); doi: 10.1117/12.279337
Show Author Affiliations
Yi Yang, Jilin Univ. (China)
Jinman Huang, Jilin Univ. (China)
Shanhua Xue, Jilin Univ. (China)
Yuguang Ma, Jilin Univ. (China)
Shiyong Liu, Jilin Univ. (China)
Jiachong Shen, Jilin Univ. (China)

Published in SPIE Proceedings Vol. 3148:
Organic Light-Emitting Materials and Devices
Zakya H. Kafafi, Editor(s)

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