Solution-processable organic small molecules exhibiting the aggregation-induced emission (AIE) feature as electroluminescent (EL) emitters are very desirable because they can combine the low-cost solution processability of polymers, the reproducible well-defined structures of small molecules, and the strong solid-state fluorescence of AIE molecules; however, they are rarely reported. Herein, we first investigated the thermal stability, optical properties, stimuli-responsive behaviors, and application in solution-processed EL device of 2,6-bis(diethoxylphosphorylmethyl)-9,10-bis(N-alkylcarbazol-3-yl-vinyl)-anthracence (PAC8). PAC8 exhibited AIE behaviour, reversible mechanochromic luminescence, good thermal stability and strong crystalline green emission. More interestingly, PAC8 solution could be spin-coated into a good quality film, and the solution-processed non-doped EL device emitted 596 nm of orange-red light with peak luminous efficiencies (9.4 cd A⁻¹ and 3.9 lm W⁻¹) and external quantum efficiency up to 3.9%. This impressive EL performance signified that the pendent diethoxylphosphorylmethyl groups could be used as a promising avenue for improving the film-formation and EL performance.

中文翻译：

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具有侧链二乙氧基磷酰基甲基的AIE活性9,10-双（烷基芳基乙烯基）蒽作为溶液可加工的高效EL发光体

具有电致发光（EL）发射体的具有聚集诱导发射（AIE）功能的可溶液处理的有机小分子非常可取，因为它们可以结合聚合物的低成本溶液可加工性，可再现的定义良好的小分子结构以及AIE分子的强固态荧光；但是，很少有报道。在这里，我们首先研究了2,6-双（二乙氧基磷酰基甲基）-9,10-双（N-烷基咔唑-3-基-乙烯基）的热稳定性，光学性质，刺激响应行为及其在溶液加工的EL器件中的应用。）-炭疽热（PAC8）。PAC8表现出AIE行为，可逆的变色发光，良好的热稳定性和强烈的结晶绿色发射。更有趣的是，可以将PAC8溶液旋涂成高质量的薄膜，溶液处理的非掺杂EL器件发出596 nm的橙红色光，具有峰值发光效率（9.4 cd A ^-1和3.9 lm W ^-1），外部量子效率高达3.9％。这种令人印象深刻的EL性能表明，侧链二乙氧基磷酰基甲基可以用作改善成膜和EL性能的有前途的途径。