Chin. Phys. Lett.  2003, Vol. 20 Issue (7): 1141-1143    DOI:
Original Articles |
Highly Efficient Polymer Light-Emitting Devices Using a New Phosphorescent Material
WANG Jian-Hua;DUAN Lian;WANG Li-Duo;QIU Yong
Organic Optoelectronics Laboratory, Department of Chemistry, Tsinghua University, Beijing 100084
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WANG Jian-Hua, DUAN Lian, WANG Li-Duo et al  2003 Chin. Phys. Lett. 20 1141-1143
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Abstract A new phosphorescent material bis(2-phenyl-benzoimiazole) acetylacetonato iridium ((PBI)2IrAcac) is designed and synthesized. The absorption, photoluminescence and electroluminescence are measured. The polymer-based light-emitting devices which use polyvinylcarbazole (PVK) as host and (PBI)2IrAcac as emitter were fabricated. These light-emitting devices show a bright green emission at 548 nm. The device ITO/(PBI)2IrAcac:PVK/BCP/ Alq3/Mg:Ag shows a very high efficiency. A peak external quantum efficiency of 21.5 cd/A (5.8%) was obtained at 0.1 mA/cm2. The maximum brightness is 3840 cd/m2.
Keywords: 78.60.Fi      78.55.-m     
Published: 01 July 2003
PACS:  78.60.Fi (Electroluminescence)  
  78.55.-m (Photoluminescence, properties and materials)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2003/V20/I7/01141
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WANG Jian-Hua
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QIU Yong
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