Journal
ORGANIC ELECTRONICS
Volume 10, Issue 7, Pages 1408-1411Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2009.07.001
Keywords
Organic; Electroluminescence; Nir-infrared; Sensitized
Funding
- National Natural Science Foundation of China [10604054, 60877027]
- Burea of science and technology of Changchun city [08KZ24]
- The Chinese Academy of Sciences [KJCX2-YW-M11]
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We demonstrate enhanced near-infrared (NIR) electroluminescence (EL) of copper phthalocyanine (CuPc) phosphor doped organic light emitting diodes (OLED) by introducing a red phosphor, bis(1-phenylisoquinolinato) iridium(III) acetylacetonate (Ir(piq)(2)acac). For the codoped device, due to presence of Ir(piq)(2)acac, the NIR emission peaked at 1120 nm of CuPc was increased by 15 times comparing with the CuPc monodoped device. The enhancement of NIR emission of CuPc emitter was principally attributed to an energy transfer from Ir(piq)(2)acac to CuPc. and the sensitized mechanism was also discussed in detail. (C) 2009 Elsevier B.V. All rights reserved.
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