Lu Junjian, Li Hui, Yao Bing, Zhao Bin, Weng Chao, Lei Gangtie, Shen Ping, Xie Zhiyuan, Tan Songting
Xiangtan University, PR China.
J Phys Chem B. 2009 Apr 2;113(13):4203-8. doi: 10.1021/jp808740x.
A series of block copolymers containing nonconjugated spacer and 3D pi-pi stacking structure with simultaneous blue-, green-, and yellow-emitting units has been synthesized and characterized. The dependence of the energy transfer and electroluminescence (EL) properties of these block copolymers on the contents of oligo(phenylenevinylene)s has been investigated. The block copolymer (GEO8-BEO-YEO4) with 98.8% blue-emitting oligomer (BEO), 0.8% green-emitting oligomer (GEO), and 0.4% yellow-emitting oligomer (YEO) showed the best electroluminescent performance, exhibiting a maximum luminance of 2309 cd/m(2) and efficiency of 0.34 cd/A. The single-layer-polymer light-emitting diodes device based on GEO2-BEO-YEO4 emitted greenish white light with the CIE coordinates of (0.26, 0.37) at 10 V. The synergetic effect of the efficient energy transfer and 3D pi-pi stack of these block copolymers on the photoluminescent and electroluminescent properties are investigated.
已经合成并表征了一系列含有非共轭间隔基和具有同时发射蓝色、绿色和黄色发光单元的三维π-π堆积结构的嵌段共聚物。研究了这些嵌段共聚物的能量转移和电致发光（EL）性能对聚（亚苯基亚乙烯基）含量的依赖性。含有98.8%蓝色发光低聚物（BEO）、0.8%绿色发光低聚物（GEO）和0.4%黄色发光低聚物（YEO）的嵌段共聚物（GEO8-BEO-YEO4）表现出最佳的电致发光性能，最大亮度为2309 cd/m²，效率为0.34 cd/A。基于GEO2-BEO-YEO4的单层聚合物发光二极管器件在10 V时发射出CIE坐标为（0.26, 0.37）的绿白色光。研究了这些嵌段共聚物的有效能量转移和三维π-π堆积对光致发光和电致发光性能的协同效应。
