第 51 卷第 2 期Vol. 51 No. 2
2021 年 4 月Apr 2021

所属栏目:功能材料

基于苯并二噻吩的核小分子受体材料合成及其光伏性能研究
谢 亮1,陈景龙2,梁淑敏1,李皇芬1,曹佳民1*,肖曼军2*,唐子龙1* (1. 湖南科技大学 化学化工学院 理论有机化学与功能分子教育部重点实验室,湖南 湘潭 411201;2. 湘潭大学 化学学院 环境友好化学与应用教育部重点实验室,湖南 湘潭 411105)
摘 要:以苯并[1,2-b:4,5-b']二噻吩-4,8-二酮和3-(2-癸基十四烷基)噻吩为原料,通过数步反应高效合成了三种目标小分子受体BDT-2H、BDT-2F和BDT-2Cl。三种小分子受体具有依次红移的吸收光谱,光学带隙分别为1.72、1.70、1.65 eV,HOMO和LUMO能级也呈现出依次降低的趋势。因此,三种小分子受体分别与聚合物给体PBDB-T共混制备的有机太阳能电池具有依次降低的开路电压(0.99、0.88、0.80 V)和逐步提高的短路电流(6.74、11.63、15.63 mA·cm-2),能量转换效率分别为2.82%、5.64%和7.17%。
关键词:有机太阳能电池;小分子受体;苯并二噻吩;光伏性能
中图分类号:TM914  文献标识码:A  文章编号:1009-9212(2021)02-0050-05
Synthesis and Photovoltaic Properties of Small-molecule Acceptors Based on Benzodithiophene Core
XIE Liang1, CHEN Jing-long2, LIANG Shu-min1, LI Huang-fen1, CAO Jia-min1*, XIAO Man-jun2*, TANG Zi-long1* (1. Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; 2. Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China)
Abstract:Three small-molecule acceptors (SMAs) including BDT-2H,BDT-2F and BDT-2Cl were synthesized efficiently in several steps using benzo[1,2-b:4,5-b'] dithiophene-4,8-dione and 3-(2-decyltetradecyl) thiophene as the starting materials. From BDT-2H to BDT-2F and BDT-2Cl, the absorption spectra were red-shifted with the optical bandgaps of 1.72, 1.70 and 1.65 eV, respectively, and the HOMO and LUMO energy levels also decreased successively. Therefore, the organic solar cells using PBDB-T as the donor material and three SMAs as the acceptor materials exhibited lower open-circuit voltage (0.99, 0.88 and 0.80 V) and enhanced short-circuit current (6.74, 11.63 and 15.63 mA·cm-2) gradually, and the energy conversion efficiencies of 2.82%, 5.64% and 7.17% were achieved for these three cells, respectively.
Key words:organic solar cells; small-molecule acceptors; benzodithiophene; photovoltaic properties
基金项目:国家自然科学基金资助项目(21604021),湖南省自然科学基金资助项目(2018JJ3141)。
作者简介:谢 亮(1996—),男,湖南耒阳人,硕士研究生,研究方向:有机太阳能电池(E-mail:794234012@qq.com)。
联 系 人:曹佳民,副教授,研究方向:有机功能材料(E-mail:minjiacao@163.com);肖曼军,讲师,研究方向:有机光电材料与器械(E-mial:xmjo704@163.com);唐子龙,教授,研究方向:有机合成、药物和农药化学(E-mail:zltang67@aliyun.com)。
收稿日期:2021-03-21