A new cationic iridium(III) complex applied as the luminescence conversion material in InGaN-based light-emitting diodes

作者：Tang, Huaijun^*; Meng, Guoyun; Chen, Zeyu; Liu, Yong; Wei, Liying; Wang, Zhengliang

来源：Journal of Materials Science: Materials in Electronics , 2015, 26(5): 2824-2829.

DOI：10.1007/s10854-015-2764-2

• BLUE
• GREEN
• COPOLYMER
• PHOSPHOR
• LIGANDS
• SALT

A new cationic iridium(III) complex [(ppy)(2) Ir(L)] PF6 (ppy = 2-phenylpyridine, L = 1,1'-diethyl-1H, 1'H-2,2'-bibenzo[d]imidazole) was synthesized and characterized by ultraviolet-visible absorption spectra, thermogravimetry and photoluminescence. The mixtures of the iridium(III) complex powder blended in epoxy resin at the concentration of 6.0, 8.0 and 10.0 wt % were applied as the luminescence conversion material in light-emitting diodes (LEDs) in incorporation with 395 nm-emitting InGaN chips. The emission of the InGaN chip was completely absorbed by the iridium(III) complex and only greenish yellow light of the iridium(III) complex was emitted from the LEDs with CIE color coordinates around (0.45, 0.53). At 20 mA forward current, the LEDs exhibited the maximum power efficiency of 13.1 lm W-1 at an optimal blending concentration of 8.0 wt %.

• 出版日期2015-5