Molecular design and synthesis of highly soluble hole transporting materials based on phenylnaphthalene cores for solution-processible OLEDs
作者:Jaekyum Kim、Dae-Hee Lee、Jongwook Park、Soonhang Lee、Jihoon Lee
DOI:10.1016/j.dyepig.2023.111879
日期:2024.3
Highly soluble small molecules are crucial to realizing large-area solution-processible organic light-emitting diodes with consistent performance. In this study, a series of solution-processable hole transporting materials (HTMs) based on 1,4- and 2,6-phenylnaphthalene (NP) cores were synthesized. The cores had an asymmetric and twisted structure, which enhanced the solubility and thermal stability
高度可溶的小分子对于实现具有一致性能的大面积可溶液加工有机发光二极管至关重要。在这项研究中,合成了一系列基于1,4-和2,6-苯基萘(NP)核的可溶液加工的空穴传输材料(HTM)。核具有不对称和扭曲的结构,增强了材料的溶解度和热稳定性。密度泛函理论计算和MD模拟表明,2,6-NP核表现出共面核结构,与1,4-NP核相比,空穴重组能降低,空穴迁移率增强。此外,2,6-NP-核材料表现出比1,4-NP-核材料更高的溶解度。 2,6-NPNP也表现出最高的溶解度,比商业化的HTM N,N'-二(1-萘基)-N,N'-二苯基-(1,1'-联苯)-4高约50倍,4'-二胺(NPB)。值得注意的是,当使用 2,6-NPNP 作为 HTM 时,开启电压 (V on = 2.54 V) 和工作电压 (V op = 5.67 V @ 1000 nit)溶液处理的 OLED 的 OLED 器件的 OLED 器件的器件性能低于使用