High-efficiency electrophosphorescent organic light-emitting devices based on Schiff base platinum(II) complexes

Hai-Feng Xiang; Siu-Chung Chan; Chi-Ming Che; P. T. Lai; Po Ching Chui

doi:10.1117/12.565320

10 November 2004 High-efficiency electrophosphorescent organic light-emitting devices based on Schiff base platinum(II) complexes

Hai-Feng Xiang, Siu-Chung Chan, Chi-Ming Che, P. T. Lai, Po Ching Chui

Author Affiliations +

Proceedings Volume 5519, Organic Light-Emitting Materials and Devices VIII; (2004) https://doi.org/10.1117/12.565320
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Hai-Feng Xiang, Siu-Chung Chan, Chi-Ming Che, P. T. Lai, and Po Ching Chui "High-efficiency electrophosphorescent organic light-emitting devices based on Schiff base platinum(II) complexes", Proc. SPIE 5519, Organic Light-Emitting Materials and Devices VIII, (10 November 2004); https://doi.org/10.1117/12.565320

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