Jeon Soon Ok, Yook Kyoung Soo, Joo Chul Woong, Lee Jun Yeob
Department of Polymer Science and Engineering, Dankook University Jukjeon-dong, Suji-gu, Gyeonggi-do, 448-701, Korea
Opt Lett. 2009 Feb 15;34(4):407-9. doi: 10.1364/ol.34.000407.
Highly efficient phosphorescent white organic light-emitting diodes (PHWOLEDs) were developed by the doping of phosphorescent blue and red dopants in a spirofluorene-based phosphine oxide host material. A high quantum efficiency of 18.3% and a current efficiency of 34.2 cd/A at 100 cd/m(2) were obtained from the PHWOLED with the spirofluorene-based phosphine oxide host material. In addition, a high power efficiency of 28.3 lm/W was achieved in the PHWOLED. The wide triplet bandgap of host and charge balance in the light-emititng layer were responsible for the high efficiency.
通过将磷光蓝色和红色掺杂剂掺杂到基于螺芴的氧化膦主体材料中，开发出了高效磷光白色有机发光二极管（PHWOLED）。使用基于螺芴的氧化膦主体材料的PHWOLED在100 cd/m²时获得了18.3%的高量子效率和34.2 cd/A的电流效率。此外，该PHWOLED实现了28.3 lm/W的高功率效率。主体的宽三重态带隙和发光层中的电荷平衡是实现高效率的原因。
