Bright-yellow molecular organic light-emitting diodes based on two novel silole derivatives

Lu Li; Wei Li; Junsheng Yu; Qing Li; Shuangling Lou; Yadong Jiang; Xiaowei Zhan

doi:10.1117/12.783639

14 November 2007 Bright-yellow molecular organic light-emitting diodes based on two novel silole derivatives

Lu Li, Wei Li, Junsheng Yu, Qing Li, Shuangling Lou, Yadong Jiang, Xiaowei Zhan

Proceedings Volume 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 672242 (2007) https://doi.org/10.1117/12.783639
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China

Abstract

High-efficient molecular organic light-emitting diodes using two novel silole derivatives as emitter is reported in the paper. Multilayer organic light-emitting diodes with a structure of indium tin oxide(ITO)/N, N'-bis- (1-naphthyl)-N,N'-biphenyl-1,1'-biphenyl-4,4'-diamine (NPB)/2,5-bis(9,9-dimethyl-9H-fluorene-2-yl)-1,1,3,4-tera-phenylsilole (DMFPSi)/tri-(8-hydroxyquinoline)- aluminum (Alq₃)/Mg:Ag and ITO/NPB/2,5-bis(thiophene-2-yl)--1,1,3,4-tetraphenyl-1H-silole (BTTPSi)/Alq₃/Mg:Ag have been fabricated, where Alq₃ was used as an electron transport layer. These two silole derivatives have similar backbone, so EL properties are parallelly characterized. Luminance-voltage and current density-voltage characteristics of both devices were investigated and device performances were discussed. Experimental results demonstrate that the devices consisting of DMFPSi and BTTPSi with high efficiency of yellow light emission, and the maximum luminance of 16,000 cd/m² at bias voltage of 12.5 V and 12,500 cd/m2 at bias voltage of 16.5 V, can be respectively achieved. The maximum luminance efficiencies of 2.35 lm/W at 625 cd/m² for DMFPSi and 0.5 lm/W at 4000 cd/m² for BTTPSi are obtained. The peak of EL spectrum locates at 555 and 580 nm, respectively, which are independent of the variation of bias voltage.

Citation Download Citation

Lu Li, Wei Li, Junsheng Yu, Qing Li, Shuangling Lou, Yadong Jiang, and Xiaowei Zhan "Bright-yellow molecular organic light-emitting diodes based on two novel silole derivatives", Proc. SPIE 6722, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 672242 (14 November 2007); https://doi.org/10.1117/12.783639

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KEYWORDS

Organic light emitting diodes

Electroluminescence

Electron transport

Lithium

Aluminum

Excitons

Luminescence

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