高等学校化学学报2023，Vol.44Issue(9)：231-241,11.DOI:10.7503/cjcu20230190
苯并三氮唑稠环基p-型聚合物:通过骨架噻吩和硒吩策略精细调控吸收与带隙
Fused-benzotriazole Based p-Type Polymers:Fine-tuning on Absorption Band-width and Bandgap via Backbone Thiophene and Selenophene Strategies
摘要
Abstract
Four fused-benzotriazole based p-type polymers(BDT-TT,BDT-Se,BDD-TT,and BDD-Se)were designed and synthesized,and the fine-tuning on absorption band-widths and bandgaps via the backbone seleno-phene and thiophene strategies were reported.First,we introduced dithienothiophen[3,2-b]pyrrolobenzotriazole to co-polymerize with BDT-2F and synthesized BDT-TT.Then,we used selenophene to replace the thienothiophene units on the dithienothiophen[3,2-b]pyrrolobenzotriazole and synthesized BDT-Se.Compared to BDT-TT,BDT-Se showed a reduced bandgap from 2.0 eV to 1.89 eV.After that,we used BDD to replace BDT-2F and synthesized BDD-TT by co-polymerizing with dithienothiophen[3,2-b]pyrrolobenzotriazole.In comparison to BDT-TT,BDD-TT showed extended absorption band-width with the full-width-at-the-half-maximum(FWHM)increased from 138 nm to 229 nm and reduced bandgap from 2.0 eV to 1.71 eV.At last,we combined BDD and diselenophen[3,2-b]pyrrolo-benzotriazole and synthesized BDD-Se,which achieved extended absorption and further reduced bandgap(1.61 eV).Using PC71BM as the electron acceptor material,the organic solar cells fabricated by the four polymers gave the efficiencies of 1%—2%.关键词
苯并三氮唑/稠环单元/聚合物/有机太阳电池/带隙Key words
Benzotriazole/Fused-ring/Polymer/Organic solar cell/Bandgap分类
化学化工引用本文复制引用
田梅,张志洋,詹传郎..苯并三氮唑稠环基p-型聚合物:通过骨架噻吩和硒吩策略精细调控吸收与带隙[J].高等学校化学学报,2023,44(9):231-241,11.基金项目
内蒙古科技攻关项目(批准号:2020GG0192)、内蒙古自然科学基金(批准号:2022ZD04)和内蒙古师范大学项目(批准号:112/1004031962)资助.Supported by the Program of the Department of Science and Technology of Inner Mongolia,China(No.2020GG0192),the Natural Science Founda-tion of Inner Mongolia,China(No.2022ZD04),and the Program of the Inner Mongolia Normal University,China(No.112/1004031962). （批准号:2020GG0192）
