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

by Xuefeng Ren 1,2, Hai Song 1,2, Jing Xiao 3,4, Hui-Juan Yu 3,4,*, Chi-Fang Peng 5 and Guang Shao 3,4,*
1
College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, China
2
Key Laboratory of Hexi Corridor Resources Utilization of Gansu, Hexi University, Zhangye 734000, China
3
School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China
4
Shenzhen Research Institute, Sun Yat-sen University, Shenzhen 518057, China
5
School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
*
Authors to whom correspondence should be addressed.
Micromachines 2019, 10(10), 703; https://doi.org/10.3390/mi10100703
Received: 20 August 2019 / Revised: 29 September 2019 / Accepted: 9 October 2019 / Published: 15 October 2019
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. View Full-Text
Keywords: phosphors; luminescence; chemical synthesis; bathochromic shift phosphors; luminescence; chemical synthesis; bathochromic shift
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MDPI and ACS Style

Ren, X.; Song, H.; Xiao, J.; Yu, H.-J.; Peng, C.-F.; Shao, G. Green Phosphors Based on 9,10-bis((4-((3,7-dimethyloctyl)oxy) phenyl) ethynyl) Anthracene for LED. Micromachines 2019, 10, 703.

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