磷光有机发光二极管
磷光
材料科学
芴
量子效率
有机发光二极管
轨道能级差
光电子学
二极管
电效率
图层(电子)
分子
纳米技术
光学
化学
功率(物理)
物理
聚合物
荧光
有机化学
量子力学
复合材料
作者
Fabien Lucas,Olzhas A. Ibraikulov,Cassandre Quinton,Lambert Sicard,T. Heiser,Denis Tondelier,Bernard Geffroy,Nicolas Leclerc,Joëlle Rault‐Berthelot,Cyril Poriel
标识
DOI:10.1002/adom.201901225
摘要
Abstract Herein, a high‐efficiency host material for single‐layer phosphorescent organic light‐emitting diodes (SL‐PhOLEDs) is reported. This host material is synthesized via an efficient approach and is constructed on the association of an electron‐rich phenylacridine unit connected by a spiro carbon atom to an electron‐deficient 2,7‐bis(diphenylphosphineoxide)‐fluorene. In addition to a high E T value and adequate highest occupied molecular orbital/lowest unoccupied molecular orbital energy levels, the key point in this molecular design is the suitable balance between hole and electron mobilities, which leads to a high‐performance blue SL‐PhOLED with an external quantum efficiency of 17.6% (current efficiency = 37.8 cd A −1 and power efficiency = 37.1 lm W −1 ) and a low V on of 2.5 V. This performance shows that the molecular design of the present host fulfills the criteria required for high‐efficiency SL‐PhOLEDs. The present performance is one of the highest reported to date for blue SL‐PhOLEDs and more importantly shows the potential of such a molecular design to reach very high‐performance single‐layer devices.
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