In this work, we report two simple and efficient electron transport (ET) type host materials, namely 2-(3-(10-phenylanthracen-9-yl)-phenyl)dibenzo[b,d]furan (m-PPDF) and 2-(4-(10-phenylanthracen-9-yl)phenyl)dibenzo[b,d]furan (p-PPDF) based on 9,10-diphenylanthracene and dibenzofuran moieties. The designed host materials show excellent thermal stability with thermal decomposition temperature (Td) above 351 °C. The computational studies and carrier transport analysis proved good electron-transporting features of these hosts. The synthesized materials were utilized as hosts for multiple resonance emitters (DABNA-NP-TB) based blue OLEDs. The fabricated OLED device based on p-PPDF host and DABNA-NP-TB dopant shows a high external quantum efficiency (EQE) of 7.03% with a narrow spectrum in deep blue color and Commission International de l’Eclairage (CIE) coordinate of (0.136, 0.076). Further, the operational lifetime at 95% initial luminescence decay (LT₉₅) of the p-PPDF based host device shows 85 h at 600 cd/m², which is increased by 1.7 times compared with the well-known bipolar host (PhPC). Further, we analyzed that such a long lifetime is attributed to the improved stability of electron transfer type-designed hosts.

在这项工作中，我们报告了两种简单有效的电子传输 (ET) 型主体材料，即 2-(3-(10-phenylanthracen-9-yl)-phenyl)dibenzo[b,d]furan (m-PPDF) 和基于 9,10-二苯基蒽和二苯并呋喃部分的 2-(4-(10-苯基蒽-9-基)苯基)二苯并[b,d]呋喃 (p-PPDF)。所设计的主体材料表现出优异的热稳定性，热分解温度 (Td) 高于 351 °C。计算研究和载流子传输分析证明了这些主体具有良好的电子传输特性。合成的材料被用作基于多共振发射器 (DABNA-NP-TB) 的蓝色 OLED 的主体。基于 p-PPDF 主体和 DABNA-NP-TB 掺杂剂制造的 OLED 器件显示出 7 的高外部量子效率 (EQE)。03% 具有窄光谱深蓝色和国际照明委员会 (CIE) 坐标 (0.136, 0.076)。此外，在 95% 初始发光衰减 (LT_{基于 p-PPDF 的主机设备的图95} ) 在 600 cd/m ²下显示 85 h，与众所周知的双极主机 (PhPC) 相比增加了 1.7 倍。此外，我们分析了如此长的寿命归因于电子转移型设计的主体的稳定性提高。