Citation: 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 shu

Luminescence Properties of the Conjugated System Containing Benzoimidazole Structural Units and Its Organic Light-Emitting Diode (OLED)

a.
School of Chemical Engineering and Technology, Sun Yat-Sen University, Guangzhou 510275
b.
Guangdong Petrochemical Research Institute, Guangzhou 510665
c.
China National Analysis Center of Guangzhou, Guangzhou 510070

Corresponding author: Song Huacan, songhc2007@163.com
Received Date: 29 September 2017
Revised Date: 6 October 2017
Available Online: 21 January 2017
Fund Project: the Special Project of Science and Technology Development of Guangdong Academy of Sciences 2017GDASCX-0104the Science and Technology Planning Project of Guangdong Province 2017A070702017the Science and Technology Planning Project of Guangdong Province 2017A040405040Project 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)

Figures(7)

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 (λ_a), fluorescence emission wavelength (λ_e), 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.
- benzoimidazole,
- luminescent property,
- organic light-emitting diode (OLED)
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