Green Phosphors Based on 9,10-bis((4-((3,7-dimethyloctyl)oxy) phenyl) ethynyl) Anthracene for LED

Micromachines

Xuefeng Ren¹  Hai Song¹  Hui-Juan Yu²  Jing Xiao²  Guang Shao²  Chi-Fang Peng³ 

[1] College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, China;School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China;School of Food Science and Technology, Jiangnan University, Wuxi 214122, China;

关键词: phosphors;    luminescence;    chemical synthesis;    bathochromic shift;   

DOI  :  10.3390/mi10100703

来源: DOAJ

【 摘 要 】

An anthracene aromatic unit was introduced into the phenylethynyl structure by a rigid acetylene linkage at the C-9 and C-10 positions via Sonogashira coupling reactions, resulting in a planar and straight-backbone molecule (9,10-bis((4-((3,7-dimethyloctyl)oxy) phenyl) ethynyl) anthracene) (BPEA). Thermogravimetric analysis demonstrated the good thermal stability of the BPEA. Photoluminescence analysis showed that a suitable expanded π-conjugation in the BPEA made its excitation band extend into the visible region, and an intense green emission was observed under blue-light excitation. A bright green light-emitting diode with an efficiency of 18.22 lm/w was fabricated by coating the organic phosphor onto a 460 nm-emitting InGaN chip. All the results indicate that BPEA is a useful green-emitting material which is efficiently excited by blue light, and therefore, that it could be applied in many fields without UV radiation.

【 授权许可】

Unknown