Triphenyl phosphine oxide-bridged bipolar host materials for green and red phosphorescent organic light-emitting diodes
作者:Qingwei Zhang、Da Fang、Hongji Jiang、Xinwen Zhang、Hongmei Zhang
DOI:10.1016/j.orgel.2015.09.002
日期:2015.12
9'-xanthen]-2-yl)phenyl)phosphine oxide (2SFOPO) and (4-(9-ethyl-9H- carbazol-3-yl)phenyl)(phenyl)(4-(spiro[fluorene-9,9′-xanthen]-2-yl)phenyl)phosphine oxide (SFOPO-CZ) were designed, synthesized and characterized. Their thermal, photophysical, electrochemical properties and device applications were further investigated to correlate the chemical structure of bipolar host materials with the electroluminescent
苯基双(4-(螺[芴[9,9'-黄嘌呤] -2-基] -2-基)苯基)氧化膦(2SFOPO)和(4-(9-乙基-9H-咔唑-3-设计,合成和表征了基)苯基)(苯基)(4-(螺[芴-9,9'-黄嘌呤] -2-基]苯基)氧化膦(SFOPO-CZ)。进一步研究了它们的热,光物理,电化学性质和器件应用,以将双极性主体材料的化学结构与磷光有机发光二极管(PhOLED)的电致发光性能相关联。两者在玻璃化转变温度为105–122°C和5%失重5%的热分解温度为406–494°C时均显示出高的热稳定性。化合物2SFOPO的光学带隙CH 2 Cl 2溶液中的SFO和SFOPO-CZ分别为3.46和3.35 eV,它们的三重态能级分别为2.51 eV和2.52 eV。获得了高达50%的掺杂绿色器件的发射层的高光致发光量子效率。利用开发的材料,已经证明了在简单的器件配置中高效的绿色和红色PhOLED。结果,掺杂