Temperature-dependent electroluminescence from (Eu, Gd) coordination complexes
作者:
Xianmin Zhang,
Runguang Sun,
Qianbing Zheng,
Takayoshi Kobayashi,
Wenlian Li,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 71,
issue 18
页码: 2596-2598
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119339
出版商: AIP
数据来源: AIP
摘要:
Light emission from single-layered electroluminescent devices is described in which (Eu, Gd) coordination complexes,(Eu0.1Gd0.9)(TTA)3(TPPO)2,and electron transport material oxadiazole derivative, 2-(4-biphenyl)-5-(4-t-butylphenylyl)-1,3,4-oxadiazole, are dispersed in a hole-transporting host polymer poly(N-vinylcarbazole) film. The color of the emitted electroluminescence changes smoothly from green-white to red with temperature varying from 77 to 300 K. This phenomenon is discussed in terms of temperature dependent yields of phosphorescence from the triplet state of the Gd and Eu chelates and the intermolecular energy transfer from Gd-chelate to Eu-chelate cages. ©1997 American Institute of Physics.
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