Highly Efficient Polymer Light-Emitting Devices Using a New Phosphorescent Material

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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