Thermally stable high triplet energy host materials based on a fluorenobenzofuran (BFF) core were synthesized and the device performances of green phosphorescent organic light-emitting diodes were investigated. BFF was designed as the electron transport type core with improved thermal stability. Two host materials based on the BFF core showed a high glass transition temperature over 140 °C and high triplet energy above 2.70 eV. They were used as the host materials for green phosphorescent organic light-emitting diodes and a high quantum efficiency close to 20% was achieved.
合成了基于
芴基
苯并呋喃(BFF)内核的热稳定性高三重态能量宿主材料,并研究了绿色
磷光有机发光二极管的器件性能。BFF 被设计为具有更高热稳定性的电子传输型内核。基于 BFF 内核的两种宿主材料显示出 140 ℃ 以上的高
玻璃化转变温度和 2.70 eV 以上的高三重态能。它们被用作绿色
磷光有机发光二极管的宿主材料,并实现了接近 20% 的高量子效率。