共轭共聚物聚(3-己基噻吩-共二苯基吡咯)的电化学合成:逐步提高电光特性的方法

Thao Phuong Le Nguyen, Cam Hong Thi Nguyen, T. H. Luu, T. Truong, B. Doan, T. Nguyen, H. T. Nguyen
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引用次数: 0

摘要

采用线性扫描伏安法恒电位技术,电压范围为 1.7-1.8 V,扫描速率为 0.1 mV/s,对 3-己基噻吩(3HT)进行了电化学聚合,并对 3HT 和 N-苯甲酰基二噻吩吡咯(BDP)进行了电化学共聚,以制备聚合物和共聚物薄膜。记录了聚合物和共聚物的循环伏安(CV)曲线、傅立叶变换红外(FTIR)光谱、扫描电子显微镜(SEM)图像和紫外可见吸收光谱,以分析和比较电聚合过程和所得薄膜的特性。以 3HT 和 BDP 为基料的共聚物的扫描电子显微镜照片显示了一种具有大球形聚集体的刚性结构,平均尺寸约为 200 纳米。经电化学测量,3HT 和 BDP 共聚物的带隙为 2.25 eV,高于均聚物聚(3-己基噻吩)(P3HT)的带隙。与聚合物 P3HT 相比,共聚物的能带隙 HOMO-LUMO 有所提高。此外,共轭长度的增加显著改善了共轭共聚物的形态结构和电化学稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electrochemical synthesis of conjugated copolymer poly(3-hexylthiophene-co-dithenopyrrole): Stepwise approach to enhance electro-optical properties
Electrochemical polymerisation of 3-hexylthiophene (3HT) and electrochemical copolymerisation of 3HT and N-benzoyl dithienopyrrole (BDP) were performed to prepare polymer and copolymer films using a linear sweep voltammetry potentiostatic technique with a voltage range from 1.7-1.8 V and a scan rate of 0.1 mV/s. Cyclic voltammetry (CV) curves, Fourier-transform infrared (FTIR) spectra, scanning electron microscope (SEM) images, and UV-Vis absorption spectra of the polymer and copolymer were recorded for analysis and comparison of the electropolymerisation process and properties of the resultant films. The SEM photographs of the copolymer base on 3HT and BDP exhibited a rigid structure with large spherical aggregates with an average size around 200 nm. The copolymer of 3HT and BDP exhibited the band gaps of 2.25 eV which was determined via electrochemical measurement that is higher than of band gaps of homopolymer poly(3-hexylthiophene) (P3HT). The copolymer’s energy bandgap HOMO-LUMO was enhanced compared to polymer P3HT. Moreover, the increased conjugation length significantly improved the morphology structure as well as the electrochemical stability of the conjugated copolymer.
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