Chawanpunyawat Thanyarat, Chasing Pongsakorn, Nalaoh Phattananawee, Maitarad Phornphimon, Sudyodsuk Taweesak, Promarak Vinich
Department of Materials Science and Engineering School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand.
Research Center of Nano Science and Technology, Shanghai University, Shanghai, 200444, P. R. China.
Chem Asian J. 2021 Dec 13;16(24):4145-4154. doi: 10.1002/asia.202101154. Epub 2021 Nov 10.
Herein, we present a molecular design of chrysene-based deep-blue emissive materials (TC, TpPC, TpXC, and TmPC), in which chrysene as a core is functionalized with different triphenylamine moieties to realize a fine-tuning deep-blue fluorescence with superior electroluminescent (EL) performance. The photophysical analyses and density functional theory (DFT) calculations disclose that TC, TpPC, and TpXC possess HLCT characteristics with intense deep-blue emission in the solid-state, good hole-transporting ability, and high thermal and electrochemical stabilities. They are successfully employed as non-doped emitters in simple structured OLEDs (ITO/PEDOT : PSS : NF/emitter/TPBi/LiF : Al). In particular, TC-based device emits a deep-blue light with an emission peak at 446 nm and CIE color coordinates of (0.148, 0.096), a maximum external quantum efficiency (EQE ) of 4.31%, and a low turn-on voltage of 2.8 V.
在此，我们展示了基于蒽的深蓝色发光材料（TC、TpPC、TpXC和TmPC）的分子设计，其中蒽作为核心，通过不同的三苯胺部分进行功能化，以实现具有优异电致发光（EL）性能的深蓝色荧光的精细调节。光物理分析和密度泛函理论（DFT）计算表明，TC、TpPC和TpXC具有热激活延迟荧光（HLCT）特性，在固态下具有强烈的深蓝色发射、良好的空穴传输能力以及高热稳定性和电化学稳定性。它们成功地用作简单结构有机发光二极管（ITO/PEDOT : PSS : NF/发光体/TPBi/LiF : Al）中的非掺杂发光体。特别是，基于TC的器件发射出深蓝色光，发射峰位于446 nm，CIE色坐标为（0.148, 0.096），最大外量子效率（EQE）为4.31%，开启电压低至2.8 V。
