Two duryl borane derivatives, tris(2,3,5,6-tetramethyl-4-(pyridin-3-yl)phenyl)borane (TDPB) and tris(2,3,5,6-tetramethyl-4'-(pyridin-3-yl)biphenyl-4-yl)borane (TDPPB), which contain heteroaromatic pyridine rings at peripheral positions were synthesized to investigate the effects of bridging phenyl group on their thermal, photophysical, and electrochemical properties. Upon adding a phenyl unit between duryl and pyridine units, TDPPB showed slightly higher thermal stability (T_d = 446 °C and T_g = 166 °C) than TDPB (T_d = 439 °C and T_g = 142 °C). Both TDPB and TDPPB have deep highest occupied molecular orbital levels to block the holes/excitons and appropriate lowest unoccupied molecular orbital levels for smooth electron injection. Notably, TDPB and TDPPB exhibited relatively high triplet energies of 2.84 eV and 2.69 eV, respectively. Thus, the triplet energy level of TDPB is sufficient for use in bis[2-(4,6-difluorophenyl)pyridinato-C²,N](picolinato)iridium(III) (FIrpic) based blue phosphorescent organic light-emitting diodes (PHOLEDs) as an electron transport material. Accordingly, TDPB was used as an electron transport material in FIrpic-based blue PHOLEDs and the optimized device showed high external quantum efficiency of up to 18.8%.

两种duryl硼烷衍生物，三（2,3,5,6-四甲基-4-（吡啶-3-基）苯基）硼烷（TDPB）和三（2,3,5,6-四甲基-4'-（吡啶合成了在外围位置含有杂芳族吡啶环的-3-基）联苯基-4-基）硼烷（TDPPB），以研究桥联苯基对它们的热，光物理和电化学性质的影响。在duryl和吡啶单元之间添加苯基单元后，TDDPB的热稳定性（T _d  = 446°C，T _g  = 166°C）比TDPB（T _d  = 439°C和T _g  = 142°C）略高。无论TDPB和TDPPB具有较高的最高占据分子轨道能级来阻挡空穴/激子，并具有适当的最低未占据分子轨道能级，以实现平稳的电子注入。值得注意的是，TDPB和TDPPB分别具有相对较高的三线态能量，分别为2.84 eV和2.69 eV。因此，TDPB的三重态能级足以用于基于双[2-（4,6-二氟苯基）吡啶基-C ²，N ]（吡啶并铱）铱（III）（FIrpic）的蓝色磷光有机发光二极管（ PHOLEDs）作为电子传输材料。因此，TDPB用作FIrpic中的电子传输材料的蓝色PHOLED和经过优化的器件显示出高达18.8％的高外部量子效率。