Efficient Red Phosphorescent OLEDs Using Ir(III) Complexes Based on Bezoylphenylpyridine and the Various Ancillary Ligands
作者:Jin Soo Hwang、Kum Hee Lee、Seok Jae Lee、Young Kwan Kim、Seung Soo Yoon
DOI:10.1166/jnn.2014.8441
日期:2014.8.1
A series of red phosphorescent Ir(III) complexes 1–5 based on benzoylphenylpyridine and various ancillary ligands were synthesized and their photophysical properties were investigated. The EL efficiencies were quite sensitive to the structural features of the dopants in the emitting layers. Particularly, using complex 5 as a dopant in emitting layer, a high-efficiency orange-red OLED was fabricated, showing the maximum luminance of 16900 cd/m2 at 12 V, the luminous efficiency of 12.8 cd/A, the power efficiency of 4.48 lm/W, the external quantum efficiency of 9.65% at 20 mA/cm2 and CIE x,y coordinates of (0.609, 0.390) at 12 V.
一系列基于苯甲酰苯基吡啶和各种辅助配体的红色磷光铱(III)配合物1-5被合成并研究了它们的光物理性质。电致发光效率对发光层中掺杂剂的结构特征非常敏感。特别地,使用配合物5作为发光层中的掺杂剂,制备了一种高效橙红色OLED,其在12V电压下显示出最大亮度为16900坎德拉/平方米,发光效率为12.8坎德拉/安培,功率效率为4.48流明/瓦特,在20毫安/平方厘米时的外部量子效率为9.65%,在12V电压下的CIE坐标为(0.609, 0.390)。