Introducing a New Triazoloquinoxaline-Based Fluorene Copolymer for Organic Photovoltaics: Synthesis, Characterization, and Photovoltaic Properties
Introducing a New Triazoloquinoxaline-Based Fluorene Copolymer for Organic Photovoltaics: Synthesis, Characterization, and Photovoltaic Properties
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DOI：
10.1002/pola.26465
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发表时间：
2013-02-15
影响因子：
--
通讯作者：
Brabec, Christoph J.
中科院分区：
文献类型：
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作者：
Baran, Derya;Pasker, Felix M.;Brabec, Christoph J.
合成了一种主链上含有三唑并喹喔啉和9，9-二烷基芴单元的新型给体-受体共聚物，并对其进行了表征和评价。所得聚合物PTQF显示出良好的热稳定性和在普通有机溶剂中的溶解性。循环伏安法测量显示PTQF具有分别为-5.13和-3.62eV的HOMO-LUMO能级。密度泛函理论计算表明，HOMO在噻吩和芴单元上都是离域的，LUMO主要位于三唑和吡嗪单元上。PTQF在可见光区有很宽的吸收，带隙为1.4 eV。使用Ca/Ag电极，对于1：2的PTQF：PC61 BM共混比，光伏器件表现出1.7%的效率。(C)2012 Wiley Periodicals，Inc. J. Polym.科学，部分A：聚合物。2013，51，987-992
A new donor-acceptor copolymer consisting of triazoloquinoxaline and 9,9-dialkylfluorene units on the main chain has been synthesized, characterized and evaluated as donor material in bulk heterojunction solar cells using PC61BM as an acceptor. The resulting polymer PTQF showed good thermal stability and solubility in common organic solvents. Cyclic Voltammetry measurements showed that the PTQF has HOMO-LUMO energy levels of -5.13 and -3.62 eV, respectively. DFT calculations revealed that the HOMO is delocalized all over the thiophene and fluorene units and the LUMO is localized mainly on the triazole and pyrazine units. PTQF absorbs broadly in the visible region and exhibits a bandgap of 1.4 eV. Photovoltaic devices exhibited 1.7% efficiency for 1: 2 PTQF: PC61BM blend ratio using Ca/Ag electrodes. (C) 2012 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 987-992