光学学报, 2013, 33 (8): 0816002, 网络出版: 2013-06-09  

芴与联噻吩发光共聚物的合成与发光特性

Synthesis and Luminescence Properties of Copolymer of Fluorene and Bithiophene
作者单位
1 北京交通大学发光与光信息教育部重点实验室, 北京 100044
2 南京理工大学软化学与功能材料教育部重点实验室, 江苏 南京 210094
摘要
利用Suzuki偶联反应合成了一种新型聚芴类导电聚合物发光材料:聚9,9二十二烷基芴并3,3′二对偏二氰乙烯基苯基2,7联噻吩(PFC12Th-DCN),表征了该材料的紫外可见吸收光谱、光致发光光谱以及激发光谱。此材料在300~450 nm有很强的吸收,吸收峰位于375 nm。用375 nm的光激发PFC12Th-DCN,其光致发光峰位于625 nm,是一种橙黄色发光材料。制备了结构为ITO/PEDOTPSS/ PFC12Th-DCN/Al的有机电致发光器件。该器件启亮电压为5 V,发光峰为649 nm,色坐标为(0.62, 0.36)。与光致发光光谱相比,该材料的电致发光光谱出现了约25 nm的红移,根据退火实验推断该红移是由PFC12Th-DCN分子聚集态发光引起的。
Abstract
A novel conductive polymer poly{2,7-(9,9-didodecyl-fluorene)-alt-[3,3′-p-di(dicyanide-vinylidene-phenyl)-bithiophene]}(PFC12Th-DCN) is synthesized by Suzuki cross-coupling reaction. The photoluminescence (PL) spectra, ultraviolet-visible absorption spectra and excited spectra of PFC12Th-DCN thin films are investigated in detail. The experimental results show that the conductive polymer has strong absorption from 300 nm to 450 nm and an absorption peak at 375 nm. Excited by 375 nm light, the PL spectrum of PFC12Th-DCN has a peak emission at about 625 nm, showing that it is an orange-yellow luminescent material. The electroluminescence (EL) device: ITO/PEDOTPSS/PFC12Th-DCN/Al is prepared. The turn-on voltage of the device is 5 V. The peak emission wavelength is about 649 nm and the chromaticity coordinate locates at (0.62, 0.36). Compared with its PL spectrum, the EL spectrum shows a red shift of about 25 nm. Based on the experimental results, the emission red shift is attributed to the PFC12Th-DCN molecules aggregation induced emission.

王琎, 海杰峰, 张福俊, 唐卫华. 芴与联噻吩发光共聚物的合成与发光特性[J]. 光学学报, 2013, 33(8): 0816002. Wang Jin, Hai Jiefeng, Zhang Fujun, Tang Weihua. Synthesis and Luminescence Properties of Copolymer of Fluorene and Bithiophene[J]. Acta Optica Sinica, 2013, 33(8): 0816002.

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