Preparation and properties of an organic light emitting diode with two emission colors dependent on the voltage polarity
作者:
Tatsuo Mori,
Kouji Obata,
Kaname Imaizumi,
Teruyoshi Mizutani,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 22
页码: 3309-3311
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.117289
出版商: AIP
数据来源: AIP
摘要:
We developed an organic light emitting diode (LED) that emits orange light at the forward bias (ITO anode and Al cathode) and green light at the reverse bias (ITO cathode and Al anode). The organic LED has a triple layer structure where an emission layer with different doped guest dye on each side is interposed between two hole transport layers. Its brightness, maximum 20 cd/m2was not strong because electrons are blocked by the hole transport layer near the cathode. However, the EL efficiency (lm/W) for the reverse bias was 13 times higher than that for the forward bias. ©1996 American Institute of Physics.
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