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Citation: DING Gui-Ying, JIANG Wen-Long, CHANG Xi, HUA Jie, HAN Qiang, OUYANG Xin-Hua, ZENG He-Ping. Properties of Yellow-Green Organic Light-Emitting Devices Based on (E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl) Quinolato-Zinc[J]. Acta Physico-Chimica Sinica, ;2009, 25(05): 958-962. doi: 10.3866/PKU.WHXB20090524 shu

Properties of Yellow-Green Organic Light-Emitting Devices Based on (E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl) Quinolato-Zinc

1.
College of Information Technology, Jilin Normal University, Siping 136000, Jilin Province, P. R. China; School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, P. R. China

Received Date: 22 December 2008
Available Online: 18 March 2009

We investigated the performance of yellow-green organic light-emitting devices (OLEDs) based on a novel material (E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl) quinolato-zinc (CzHQZn) with an emitting/hole-transporting layer as an acceptor. These devices were fabricated as follows: ITO/2T-NATA(30 nm)/CBP: 6% Ir(ppy)3: w CzHQZn (20 nm)/Alq3(50 nm)/LiF/Al (ITO: indium-tin oxide, 2T-NATA: 4,4',4''-{N,N-(2-naphthyl)-N-phenylamino}-triphenylamine, CBP: 4, 4-N,N'-dicarbazole-biphenyl, Ir(ppy)3: factris (2-phenylpyridine) iridium, Alq3: tris(8-quinolinolato) aluminum; w: mass fraction of CzHQZn). After studying the electroluminescence (EL) characteristics of these devices at different doping concentrations (w=5%, 10%, 12%, 15%), yellow-green OLEDs with 10% of CzHQZn were obtained with Commission International de L'Eclairage coordinates of (0.4045, 0.5113). The maximum luminance was 16110 cd·m-2 at an applied voltage of 11 V and the maximum luminous efficiency was 2.19 cd·A-1 at an applied voltage of 7 V with a maximumexternal quantumefficiency of 0.775%.
- Organic light-emitting device,
- (E)-2-(2-(9-ethyl-9H-carbazol-3-yl)vinyl) quinolato-zinc,
- Doped,
- Luminance,
- External quantumefficiency
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