5-(5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracen-7-yl)-10,15-diphenyl-10,15-dihydro-5H-diindolo[3,2-a:3′,2′-c]carbazole (DBA-DI) with high triplet energy was utilized as efficient blue emission dopant to construct solution-processed thermally activated delayed fluorescence-phosphorescence (TADF-phosphorescence) hybrid white organic light-emitting diodes (WOLEDs). Meanwhile, a series of TADF-phosphorescence hybrid WOLEDs composed of bis(2-phenylquinoline) (2,2,6,6-tetramethylheptane-3,5-dionate)iridium(III) (PQ₂Ir(dpm)), tris(2-(4-tolyl)-phenylpyridine)iridium (Ir(mppy)₃) and DBA-DI are successfully developed by introducing the co-host system consist of poly(N-vinylcarbazole) (PVK) and 2,6-bis(3-(9H-carbazol-9-yl)phenyl)pyridine (26DCzPPy) with high color rendering index (CRI) and improving the utilization of triplet excitons. Furthermore, energy transfer processes among different emitters were investigated in detail based on absorbance spectra, photoluminescence and transient photoluminescence spectra. Ultimately, the Commission Internationale de I'Eclairage coordinates of the optimum solution-processed WOLEDs in warm-white emission region are (0.41, 0.41) and high CRI is 82. Furthermore, the same device realized outstanding efficiencies of 32.14 cd A⁻¹, 21.00 lm W⁻¹ and 15.1% at high brightness of 1000 cd m⁻².

5-(5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracen-7-yl)-10,15-diphenyl-10,15-dihydro-5H-diindolo[3,2-a:具有高三线态能量的 3',2'-c]咔唑 (DBA-DI) 被用作高效的蓝色发射掺杂剂，以构建溶液处理的热激活延迟荧光-磷光 (TADF-磷光) 混合白色有机发光二极管 (WOLED) ). 同时，一系列由双（2-苯基喹啉）（2,2,6,6-四甲基庚烷-3,5-二酸）铱（III）（PQ ₂ Ir（dpm）），三（ 2-(4-甲苯基)-苯基吡啶)铱(Ir(mppy) ₃)和D​​BA-DI是通过引入由聚(N-乙烯基咔唑)(PVK)和2,6-双(3-(9H-咔唑-9-基)苯基)吡啶(26DCzPPy)组成的共主体体系成功开发的具有高显色指数（CRI）和提高三线态激子的利用率。此外，基于吸收光谱、光致发光和瞬态光致发光光谱详细研究了不同发射器之间的能量转移过程。最终，暖白光发射区域中最佳溶液处理 WOLED 的国际照明委员会坐标为 (0.41, 0.41)，高 CRI 为 82。此外，同一器件实现了 32.14 cd A ⁻¹的出色效率， 21.00 lm W ^-1和 15.1% 在 1000 cd m ^-2的高亮度下。