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苝四羧酸酯基聚合物受体光伏材料的合成与光电性质

发表时间:2014-05-15  浏览量:1801  下载量:750
全部作者: 肖生强,蒋友宇
作者单位: 武汉理工大学材料复合新技术国家重点实验室
摘 要: 以弱受体单元傒四羧酸酯为构建单元,通过选择具有不同给电子能力的噻吩并噻吩和联二噻吩单元,利用Stille偶联聚合反应合成2种新型具有给体-受体(donor-acceptor, D-A)交替共聚结构的聚合物P1和P2. 通过热重分析(thermal gravity analysis, TGA)、紫外-可见吸收光谱和电化学方法对其性质进行表征。合成的聚合物具有较好的溶解性和热稳定性,相比于常用的小分子受体材料富勒烯衍生物,其具有较窄的带隙和较高的最低未占轨道(lowest unoccupied molecular orbital,LUMO)能级,同时,其最高已占轨道(highest occupied molecular orbital,HOMO)和LUMO能级结构与常用聚合物给体材料P3HT相匹配。分别以聚合物P1和P2为受体材料,聚合物P3HT为给体材料制备了器件结构为ITO/PEDOT:PSS/P3HT:聚合物/Ca/Al的全聚合物太阳能电池,其光电转换效率分别为0.24%和0.62%.
关 键 词: 半导体材料;傒四羧酸酯;受体材料;聚合物;全聚合物有机太阳能电池
Title: Synthesis and optoelectronic properties of new polymer acceptors as photovoltaic materials based on perylene tetracarboxylic tetraester
Author: XIAO Shengqiang, JIANG Youyu
Organization: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology
Abstract: Perylene tetracarboxylic tetraester as weak acceptor unit was copolymerized with thieno [3,2-b]thiophene and 2,2′-bithiophene respectively to obtain two new donor-acceptor (D-A) type polymeric acceptors P1 and P2 through Stille copolymerization. The thermal stability, optical and electrochemical properties of both polymer acceptors were investigated by thermal gravity analysis (TGA), ultraviolet visible absorption spectra and cyclic voltammograms (CV) measurements. The polymers displayed good solubility and thermal stability. Both polymers displayed narrow optical band gap and higher-lying LUMO energy levels compared to those of fullerene acceptors, as well as well-matched HOMO and LUMO energy levels with those of P3HT as donor material. When exploited as the acceptor combined with the donor of P3HT in all-polymer solar cell with a typical device structure of ITO/PEDOT:PSS/P3HT: Polymer/Ca/Al, P1 and P2 achieved power conversion efficiency of 0.24% and 0.62% respectively.
Key words: semiconductor material; perylene tetracarboxylic tetraester; acceptor; polymer; all-polymer organic solar cell
发表期数: 2014年5月第9期
引用格式: 肖生强,蒋友宇. 苝四羧酸酯基聚合物受体光伏材料的合成与光电性质[J]. 中国科技论文在线精品论文,2014,7(9):852-858.
 
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