可用于近紫外LED芯片的铕-铱双金属配合物红光共聚荧光粉  

A red-emitting copolymer phosphors based on bimetallic Eu-Ir complex for Near-UV chip-based LEDs

作　　者：王子豪 杨亚敏[1] 张爱琴 贾虎生[1] 贾静[3] WANG Zi-hao;YANG Ya-min;ZHANG Ai-qin;JIA Hu-sheng;JIA Jing(College of Materials and Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Textile Engineering,Taiyuan University of Technology,Taiyuan 030006,China;College of Aeronautics and Astronautics,Taiyuan University of Technology,Taiyuan 030006,China)

机构地区：[1]太原理工大学材料与科学与工程学院,太原030024 [2]太原理工大学轻纺工程学院,太原030006 [3]太原理工大学航空航天学院,太原030006

出　　处：《中国光学（中英文）》2024年第2期468-480,共13页Chinese Optics

基　　金：国家自然科学基金(No.21972103);山西浙江大学新材料与化工研究院研发项目(No.2021SX-AT010)。

摘　　要：本研究以Ir配合物FIrPic作为Eu离子的配体,合成了一种新的Eu-Ir双金属配合物Eu(FIrPic)_(2)(Phen)UA,并通过自由基聚合成功制备了红色发光荧光共聚物PM-Eu-Ir,适用于商用近紫外芯片型LED。在不影响Eu^(3+)离子的荧光发射特性的前提下,加入Ir-配合物可以有效地敏化Eu^(3+)离子,增强其对400 nm紫外光的吸收。在365 nm紫外光激发下,共聚物PM-Eu-Ir在612 nm处显示出最强的发射峰,其CIE坐标为(0.461,0.254),这与365 nm近紫外芯片非常吻合。红色共聚荧光粉PM-Eu-Ir的微观形貌为典型的多层空间网络结构,除了表现出明显的红光发射和634.54μs的荧光寿命外,还在25~250℃的宽温范围内具有优异的热稳定性。使用共聚物PM-Eu-Ir制作的LED发出的红光亮度为149800 cd/m^(2)。研究结果表明,所制备的共聚荧光粉可作为红光元件用于制造近紫外芯片白光LED。In this paper,a new Eu-Ir bimetallic complex Eu(FIrPic)_(2)(Phen)UA is synthesized using the Ir complex FIrPic as ligands for Eu ions and red-emitting phosphorescent copolymer PM-Eu-Ir is successfully prepared via radical polymerization for commercial near UV chip-based LEDs.The Eu^(3+)ions were found to be effectively sensitizable by adding Ir-complex with enhanced ultra-violet light absorption at around 400 nm without affecting the fluorescence emission characteristic of the Eu^(3+)ions.The proposed copolymer PM-Eu-Ir exhibits the strongest emission peak at 612 nm with the CIE coordinates(0.461,0.254)under 365 nm ultraviolet light excitation,which matches well with the 365 nm near-UV chip.The micro-morphology of the red copolymer phosphor PM-Eu-Ir is a typical multilayer spatial network structure;as well as having appreciable red emission and the corresponding fluorescence lifetime of 634.54μs,it also has excellent thermal stability in a wide range of 25~250℃.The LEDs fabricated by the copolymer PM-Eu-Ir display red light emission with a 149800 cd/m^(2)luminance.The results support the potential utilization of prepared copolymer phosphor as a red component in the fabrication of near UV chip-based white LEDs.

关 键 词：稀土发光离子 双金属配合物 共聚型高分子荧光粉 近紫外LED 

分 类 号：TQ422[化学工程]