基于1,3,5-tri(9H-carbazol-9-yl)benzene 主体材料的高效蓝色电致磷光器件

摘要

以1,3,5-tri(9H-ctarbazol-9-yl)benzene(TCzP)为主体材料,制备了FIrpic掺杂的高效有机电致蓝光双发光层器件,最大亮度为11957 cd/m2；最大电流效率为18.8 cd/A；色坐标为(0.17,0.37)；光谱峰值位于472nm,在496 nm处有一肩峰；即使在1 000cd/m2下,其效率仍为13.5 cd/A.研究结果表明:作为主体材料,较高的三重态能量和较高的带隙对于获得高效蓝色磷光器件非常重要.%Hightly efficient blue phosphorescent organic light emitting diodes (OLEDs) based on a host material 1,3,5-tri(9H-carbazol-9-yl) benzene (TCzP) doped (iridium( HI) [ bis(4,6-difluorophenyl)-pyridinato-N, C2']picolinate) (Firpic) were fabricated, and a double-emitting layer device was also manufactured. The maximum brightness of 11 957 cd/m2, peak current efficiency of 18. 8 cd/A with Commission Internationale de L'Eclairage (CIE) coordinates of (0. 17, 0.37) were obtained. The emission peak wavelength of 472 nm with its shoulder peaking at 496 nm were observed. Even at high brightness of 1 000 cd/m , the currentefficiency remains 13. 5 cd/A. The experimental results indicate that high triplet energy and hole mobility for a host material are very important to achieve highly efficient blue phosphorescent device.