Chinese Journal of Organic Chemistry >
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).
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.
Lin Danyan , Song Senchuan , Chen Zhiyong , Guo Pengran , Chen Jianghan , Shi Huahong , Mai Yuliang , Song Huacan . Luminescence Properties of the Conjugated System Containing Benzoimidazole Structural Units and Its Organic Light-Emitting Diode (OLED)[J]. Chinese Journal of Organic Chemistry, 2018 , 38(1) : 103 -111 . DOI: 10.6023/cjoc201709047
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