发光学报, 2015, 36 (6): 685, 网络出版: 2015-06-25
混合型间隔层对荧磷混合式白色有机电致发光器件性能的影响
Improved Performance of Hybrid White Organic Light-emitting Diodes via Adjusting The Mixing Ratio in Spacer Layer
白色有机发光二极管 荧磷混合发光 混合间隔层 white organic light-emitting diodes (WOLED) hybrid fluorescence and phosphorescence mixed spacer layer
摘要
制备了基于新型蓝绿色荧光MQAB与红色磷光Ir( MDQ)2acac的荧磷混合式白色有机电致发光器件,并探讨了TPBI或UGH3两种间隔层及二者的混合间隔层的器件的发光性能.研究发现,采用TPBI和UGH3的混合间隔层可以调控载流子注入与传输的平衡.当m(TPBI):m(UGH3)= 1:1时,可有效地控制发光区域,使得器件性能得到优化,并获得发光亮度高达14 700 cd/m2的白色有机电致发光器件,最高电流效率可达11.60 cd/A,且器件具有较高的色稳定性.采用混合间隔层的器件比单用TPBI或UGH3作为间隔层的器件效率提高了200%～300%.
Abstract
Novel hybrid white organic light-emitting diodes (HWOLEDs) based on blue-green fluorescent MQAB and red phosphorescent Ir(MDQ)2acac materials were fabricated.1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)-benzene (TPBI),1,3-bis(triphenylsilyl)benzene (UGH3) or a mixture of the two at different ratios was used as a spacer layer.It is found that the mixed spacer of TPBI and UGH3 is able to tune the hole injection/transport effectively.The optimized HWOLEDs with a spacer of m(TPBI):m(UGH3)=1:1 exhibits a luminance of 14 700 cd/m2 and a current efficiency of 11.60 cd/A with an excellent color stability.In comparison with the devices using spacer of pure TPBI or pure UGH3 layer,the current efficiency from the device using mixed spacer enhanced 200%-300%.
杨柳, 何志群, 董飞, 刘姝, 刘淑洁, 梁春军. 混合型间隔层对荧磷混合式白色有机电致发光器件性能的影响[J]. 发光学报, 2015, 36(6): 685. YANG Liu, HE Zhi-qun, DONG Fei, LIU Shu, LIU Shu-jie, LIANG Chun-jun. Improved Performance of Hybrid White Organic Light-emitting Diodes via Adjusting The Mixing Ratio in Spacer Layer[J]. Chinese Journal of Luminescence, 2015, 36(6): 685.
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