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Proceedings Paper

High-efficiency electrophosphorescent organic light-emitting devices based on Schiff base platinum(II) complexes
Author(s): Hai-Feng Xiang; Siu-Chung Chan; Chi-Ming Che; P. T. Lai; Po Ching Chui
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Paper Abstract

We demonstrate very high-efficiency yellow electrophosphorescence organic light-emitting devices (OLEDs) employing platinum(II) tetradentate Schiff base complexes doping a host of 4,4’-N,N’-dicarbazole-biphenyl (CBP). The OLEDs based on Pt(II) 2 N,N'-bis(salicyli-dene)-1,1,2,2-tetramethylethylenediamine (PtSaltment) give a yellow emission with a peak maximum at 550 nm and a shoulder at 590 nm. The maximum external quantum efficiency (hext), luminous efficiency (hL), power efficiency (hP), turn-on voltage, and brightness of the 4.0 wt% PtSaltment-doped OLED are 11%, 31 cd/A, 14 lm/W, 2.8 V, and 23 000 cd/m2, respectively. Even at a brightness of 10 000 cd/m2, hext, hL, and hP of the OLEDs are 4.1%, 13 cd/A, and 4.0 lm/W, respectively. We attribute the high performance of PtSaltment to its tetramethylethylene group which suppresses the self-quenching behavior.

Paper Details

Date Published: 10 November 2004
PDF: 8 pages
Proc. SPIE 5519, Organic Light-Emitting Materials and Devices VIII, (10 November 2004); doi: 10.1117/12.565320
Show Author Affiliations
Hai-Feng Xiang, Univ. of Hong Kong (Hong Kong China)
Siu-Chung Chan, Univ. of Hong Kong (Hong Kong China)
Chi-Ming Che, Univ. of Hong Kong (Hong Kong China)
P. T. Lai, Univ. of Hong Kong (Hong Kong China)
Po Ching Chui, Univ. of Hong Kong (Hong Kong China)

Published in SPIE Proceedings Vol. 5519:
Organic Light-Emitting Materials and Devices VIII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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