Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Opt Lett. 2009 Oct 1;34(19):2946-8. doi: 10.1364/OL.34.002946.
White light is emitted by an organic light-emitting diode by inserting two blend layers of m-MTDATA:Al(DBM)(3) and TPD:Bphen between an m-MTDATA hole-transporting layer and a Bphen electron-transporting layer, where m-MTDATA, TPD, Al(DBM)(3), and Bphen are 4,4('),4('')-tris[methylpheny(phenyl)amino]-triphenylamine, N,N(')-bis(3-methylphenyl)-N,N(')-diphenylbenzidine, tris(dibenzoyl methane)-aluminum, and 4,7-diphenyl-1,10-phenanthroline molecules, respectively. The white-light spectrum consists of four broad bands that arise from blue-emitting TPD/Bphen, green-emitting m-MTDATA/Bphen, orange-emitting TPD/Al(DBM)(3), and red-emitting m-MTDATA/Al(DBM)(3) exciplexes, respectively, and strongly overlap at 400-760 nm. Any monomer emission is not generated. A high-color rendering index of 94.1, Commission Internationale de l'Eclairage-1931(x,y) coordinates of (0.33, 0.35), and correlated color temperature of 5477 K were obtained at 10 V. Discussion is given for the formation mechanism of the four exciplexes.
白光由有机发光二极管通过在 m-MTDATA 空穴传输层和 Bphen 电子传输层之间插入两个 m-MTDATA:Al(DBM)(3)和 TPD:Bphen 的共混层发射。其中 m-MTDATA、TPD、Al(DBM)(3)和 Bphen 分别为 4,4('),4('')-三[甲基苯基（苯基）氨基]-三苯基胺、N,N(')-双(3-甲基苯基)-N,N(')-二苯基联苯二胺、三（二苯甲酰甲烷）-铝和 4,7-二苯基-1,10-菲啰啉分子。白光光谱由四个宽带组成，分别来自蓝色发射的 TPD/Bphen、绿色发射的 m-MTDATA/Bphen、橙色发射的 TPD/Al(DBM)(3)和红色发射的 m-MTDATA/Al(DBM)(3)激基复合物，在 400-760nm 处强烈重叠。不会产生任何单体发射。在 10V 时，获得了 94.1 的高显色指数、国际照明委员会-1931(x,y)坐标为(0.33,0.35)和 5477K 的相关色温。讨论了四个激基复合物的形成机制。
