There has been an increasing demand for high-performance and cost-effective organic electron-transport materials for organic light-emitting diodes (OLEDs). In this contribution, we present a simple compound 3-(3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-1,10-phenanthroline through the facile Pd-catalyzed coupling of a triphenyltriazine boronic ester with 3-bromo-1,10-phenanthroline. It shows a high T_g of 112 °C. The ultraviolet photoelectron spectroscopy measurements reveal a deep HOMO level of −6.5 eV. The LUMO level is derived as −3.0 eV, based on the optical bandgap. The low-temperature solid-state phosphorescent spectrum gives a triplet energy of ∼2.36 eV. n-Doping with 8-hydroxyquinolatolithium (Liq, 1:1) leads to considerably improved electron mobility of 5.2 × 10⁻⁶–5.8 × 10⁻⁵ cm² V⁻¹ s⁻¹ at E = (2–5) × 10⁵ V cm⁻¹, in contrast with the triarylphosphine oxide-phenantroline molecular conjugate we reported previously. It has been shown that through optimizing the device structure and hence suppressing polaron-exciton annihilation, introducing this single Liq-doped electron-transport layer could offer high-efficiency and stable phosphorescent OLEDs.

对用于有机发光二极管 (OLED) 的高性能且具有成本效益的有机电子传输材料的需求不断增加。在这篇文章中，我们通过简单的 Pd 催化偶联三苯基三嗪硼酸酯与 3-溴-1,10-菲咯啉。它显示出_{112 °C 的高}Tg。紫外光电子能谱测量显示 -6.5 eV 的深 HOMO 能级。基于光学带隙，LUMO 能级推导出为 −3.0 eV。低温固态磷光光谱给出了~2.36 eV 的三重态能量。用 8-羟基喹啉锂（Liq，1:1）进行正掺杂可显着提高电子迁移率，达到 5.2 × 10 ^-6–5.8 × 10 ⁻⁵  cm ²  V ⁻¹  s ⁻¹在E  = (2–5) × 10 ⁵  V cm ⁻¹时，与我们之前报道的三芳基氧化膦-菲咯啉分子偶联物形成对比。已经表明，通过优化器件结构从而抑制极化子激子湮灭，引入这种单一的 Liq 掺杂电子传输层可以提供高效且稳定的磷光 OLED。