Organic electron-transport materials are an essential component to boost performances and stability of organic light-emitting diodes. We present a robust organic electron-transport compound 3-(6-(3-(4,6-bis(4-biphenylyl)-l,3,5-triazin-2-yl)phenyl)pyridin-2-yl)phenyldiphenylphosphine oxide by facilely coupling the triphenylphosphine oxide moiety to the 2-phenyl-4,6-bis(4-biphenylyl)-1,3,5-triazine unit via a 2,6-pyridinylene linker. It is well soluble in weakly polar solvents and possesses a high T_g of 123 °C with an exceptional T_d≈470 °C at 1% weight loss and deep HOMO/LUMO levels of ca. −6.45/-3.06 eV. The phos-phorescent spectrum measured in solid state at 77 K reveals a notable triplet energy of 2.88 eV. n-Doping with 8-hydroxyquinolatolithium (Liq) produces the electron mobility value of 4.66×10⁻⁵-3.21×10⁻⁴ cm V⁻¹s⁻¹ @(2–5)×10⁻⁵ V cm⁻¹. Moreover, the contrasting solubility of the bromo reaction intermediate and the new compound in alcoholic solvents facilitates separation. The characterizations of bottom- and top-emission green phosphorescent OLEDs involving this single Liq-doped electron-transport layer reveal long stability. In particular, the latter provides outstanding performances with 77.4 cd A⁻¹ (corresponding to an EQE of 18.7%) and 86.8 lm W⁻¹@ca. 1000 cd m⁻², based on the green emitter bis(2-phenylpyridine)(2-(4-methyl-3-phenylphenyl)pyridine)iridium(III). Moreover, driven by a constant current for ca. 640 h, the initial luminance of 1000 cd m⁻² appears almost no decay.

有机电子传输材料是提高有机发光二极管性能和稳定性的重要组成部分。我们提出了一种稳健的有机电子传输化合物3-（6-（3-（4,6-双（4-联苯基）-1,3,5-三嗪-2-基）苯基）吡啶-2-基）苯基二苯基膦通过经由2，6-亚吡啶基连接体将三苯基膦氧化物部分容易地偶联至2-苯基-4，6-双（4-联苯基）-1，3，5-三嗪单元上而形成环氧乙烷。它很好地溶于弱极性溶剂，并具有123°C的高T _g和出色的T _d重量减少1％时约≈470°C，且HOMO / LUMO的深含量约为 −6.45 / -3.06 eV。在77 K固态下测得的磷光光谱显示出2.88 eV的显着三重态能量。用8-羟基喹啉锂（Liq）进行n掺杂可产生4.66×10 ^-5 -3.21×10 ^-4 cm V ^-1 s ^-1 @（2-5）×10 ^-5 V cm ^-1的电子迁移率值。而且，溴代反应中间体和新化合物在醇溶剂中的对比溶解度有助于分离。涉及此单个Liq掺杂的电子传输层的底部和顶部发射绿色磷光OLED的表征显示出长期稳定性。特别是后者提供了77.4 cd A的出色性能^-1（对应于18.7％的EQE）和86.8 lm W ^-1 @ca。基于绿色发射体双（2-苯基吡啶）（2-（4-甲基-3-苯基苯基）吡啶）铱（III）的1000 cd m ^-2。而且，由恒定电流驱动约。640 h，1000 cd m ^-2的初始亮度几乎没有衰减。