含苯并咪唑单元共轭结构化合物及其有机发光二极管(OLED)器件发光性能研究
收稿日期: 2017-09-29
修回日期: 2017-10-06
网络出版日期: 2017-11-21
基金资助
广东省科技计划（Nos.2017A070702017，2017A040405040）和广东省科学院科技创新发展专项（No.2017GDASCX-0104）资助项目.
Luminescence Properties of the Conjugated System Containing Benzoimidazole Structural Units and Its Organic Light-Emitting Diode (OLED)
Received date: 2017-09-29
Revised date: 2017-10-06
Online published: 2017-11-21
Supported by
Project supported by the Science and Technology Planning Project of Guangdong Province (Nos. 2017A070702017, 2017A040405040) and the Special Project of Science and Technology Development of Guangdong Academy of Sciences (No. 2017GDASCX-0104).
设计合成了系列含苯并咪唑单元的共轭结构化合物，用1H NMR，13C NMR，MS和元素分析进行了结构表征，测试了它们的紫外吸收波长（λa）、荧光发射波长（λe）、荧光量子产率（Φ）和荧光寿命（τ），讨论了分子结构与其光谱特性之间的关系.结果表明这类化合物能够表现出较强的发光性能，Φ值最高者达到0.91.以1，4-二-[2-（1-苄基苯并咪唑基）]苯（5b）制作出的有机发光二极管（OLED），其发光主峰在448 nm，在电压23.8 V（875 mA•cm－2）时最大亮度到达6790 cd•m－2，最大电流功效1.17 cd•A－1，最大功率效率0.96 lm•W－1，最大外部量子效率0.92%，这些数据表明该类化合物作为OLED材料具有较大的潜在应用价值.
关键词： 苯并咪唑; 发光性能; 有机发光二极管(OLED)
林丹燕 , 宋森川 , 陈智勇 , 郭鹏然 , 陈江韩 , 史华红 , 麦裕良 , 宋化灿 . 含苯并咪唑单元共轭结构化合物及其有机发光二极管(OLED)器件发光性能研究[J]. 有机化学, 2018 , 38(1) : 103 -111 . DOI: 10.6023/cjoc201709047
A series of conjugated compounds containing imidazole structure units were designed and synthesized. Their structures were characterized by 1H NMR, 13C NMR, MS and elemental analysis. Their UV absorption wavelength (λa), fluorescence emission wavelength (λe), fluorescence quantum yield (Φ) and fluorescence lifetime (τ) were determined, and the relationships between the molecular structures and its spectral data were discussed. The results showed that these compounds possess strong luminescence characteristic, and the maximum value of Φ is 91%. 1,4-Bis-(2-(1-benzylbenzimidazole))benzene (5b) was selected to fabricate organic light-emitting diode (OLED). Its main luminous peak is at 448 nm, the maximum brightness is 6790 cd•m－2 when the voltage is 23.8 V (875 mA•cm－2), the maximum current efficiency is 1.17 cd•A－1, the maximum power efficiency is 0.96 lm•W－1, and the maximum external quantum efficiency is 0.92%, which indicate that these compounds have great potential application value as OLED materials.
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