Conjugated polymers based on benzodithiophene and arylene imides: Extended absorptions and tunable electrochemical properties
Conjugated polymers based on benzodithiophene and arylene imides: Extended absorptions and tunable electrochemical properties
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基于苯并二噻吩和亚芳基酰亚胺的共轭聚合物：扩展吸收和可调电化学性能
DOI：
10.1016/j.polymer.2010.04.035
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发表时间：
2010-06
期刊：
影响因子：
4.6
通讯作者：
Chen, Jian
中科院分区：
文献类型：
--
作者：
Hu, Xiao-Lian;Wang, Mang;Chen, Hong-Zheng;Shi, Min-Min;Chen, Jian
通过给电子单体苯并二噻吩（BDT）与三种不同的受电子单体？？二酰亚胺（PDI）、萘二酰亚胺（NDI）和邻苯二甲酰亚胺（PhI）的交替共聚，设计并合成了三种新型共轭聚合物。与BDT均聚物相比，所得共聚物在普通有机溶剂中具有良好的溶解性，在可见光区具有更宽的吸收范围，光学带隙更窄。结果表明，随着共聚单体吸电子能力的增加，共聚物的吸收峰发生红移。特别是P（BDT-NDI）薄膜的吸收边扩展到760 nm，而P（BDT-PhI）薄膜的吸收边仅在577 nm。三种聚合物的循环伏安图表明，由于PDI和NDI是强吸电子基团，P（BDT-PDI）和P（BDT-NDI）是典型的n型材料，而引入弱吸电子单体（PhI）的P（BDT-PhI）是稳定的p型材料。研究结果表明，通过适当的分子剪裁可以调节共轭聚合物的吸收范围和电化学性能，这将有助于探索理想的导电聚合物在聚合物光电子学，特别是聚合物太阳能电池中的潜在应用。
Three novel conjugated polymers have been designed and synthesized via the alternative copolymerization of the electron-donating monomer benzodithiophene (BDT) and three different electron-accepting monomers: perylene diimide (PDI), naphthalene diimide (NDI), and phthalimide (PhI). All obtained copolymers show good solubility in common organic solvents as well as broader absorptions in visible region and narrower optical band gaps compared to homopolymers from BDT units. It is found that the absorptions of the copolymers are red-shifted with increasing the electron-withdrawing ability of the co-monomer. In particular, the absorption edge of P(BDT-NDI) film extends to 760nm, whereas that of P(BDT-PhI) film is only at 577nm. Cyclic voltammograms of the three polymers disclose that P(BDT-PDI) and P(BDT-NDI) are typical n-type materials because PDI and NDI are strong electron-accepting groups, while P(BDT-PhI) is a stable p-type material where the weak electron-withdrawing monomer (PhI) is introduced. The results suggest that the absorption range and the electrochemical properties of the conjugated polymers can be tuned by appropriate molecule-tailoring, which will help exploring ideal conducting polymers for potential applications in polymer optoelectronics, especially in polymer solar cells.
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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