A green emitting iridium(III) complex with narrow emission band and its application to phosphorescence organic light-emitting diodes (OLEDs)

作者：Jung Sung Ouk; Zhao Qinghua; Park Jong Won; Kim Seul Ong; Kim Yun Hi; Oh Hyoung Yun; Kim Jinho; Kwon Soon Ki^*; Kang Youngjin

来源：Organic Electronics, 2009, 10(6): 1066-1073.

DOI：10.1016/j.orgel.2009.05.018

• Organic light-emitting diodes
• Phosphorescence
• Ir(ppy)(3) derivative
• Concentration quenching

The homoleptic Ir(III) complex, fac-tris{2-(3'-trimethylsilylphenyl)-5-trimethylsilylpyridinato}liridium, has been synthesized and characterized to investigate the effect of the substitution of bulky silyl groups on the photophysical properties and electroluminescence (EL) characteristics of Ir(ppy)(3) (ppy = 2-phenylpyridine). The absorption, emission, cyclic voltammetry and electroluminescent performance of the complex have also been evaluated. A power efficiency of 17.3 lm/W at 10 mA/cm(2) compared to 11.7 lm/W for Ir(ppy)(3) is achieved with the new complex as a dopant in phosphorescent organic light-emitting diodes (OLEDs). In addition, the complex shows a narrow emission band of a small full width at half-maximum (fwhm, ca. 50 nm) value.

• 出版日期2009-9