Electroluminescence characteristics of organic thin film pumped by pulsed excitation

被引：0
|
作者：
Zhu, Wenqing [1 ,2 ]
Gan, Zhengyu [1 ,2 ]
Wei, Bin [2 ]
Zhang, Xiaowen [1 ]
Zhang, Zhilin [1 ,2 ]
Jiang, Xueyin [1 ,2 ]
机构：
[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
[2] Minist Educ, Key Lab Adv Display & Syst Applicat, Shanghai 200072, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2010年 / 42卷 / 04期
关键词：
Organic light-emitting diodes; Current roll-off photoluminescence; pumping; Spectral blue shift; LIGHT-EMITTING-DIODES; ENERGY-TRANSFER; DYE-LASER; POLYMERS; DEVICES;
D O I：
10.1016/j.optlastec.2009.11.001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The current roll-off in organic light-emitting diodes has been studied by observing the current density versus voltage characteristics and spectra of single-layer and bilayer devices. Pumped by radiation sources of a variety of intensities, the current densities in a single-layer device decrease and spectra were shifted towards blue region. This is a result of the large amount of excess anion radicals that absorb the emitted photons. Using a bilayer device to balance the excess anion radicals is one of the methods to restrain the current roll-off. (C) 2009 Elsevier Ltd. All rights reserved.
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页码：624 / 627
页数：4
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