A new two-dimensional donor/acceptor copolymer based on 4,8-bis(2′-ethylhexylthiophene)thieno[2,3-f]benzofuran for high-performance polymer solar cells
new donor-acceptor type conjugated polymer (PTBFTPD) based on two-dimensional (2D) conjugated alkylthienyl substituted thieno[2,3-f]benzofuran (TBF) and thienopyrroledione (TPD) unit, was synthesized and applied as donor material for bulk heterojunction polymersolarcells. As a comparison, its counterpart conjugated polymer (PBDTTPD) based on alkylthienyl substituted thieno[2,3-f]benzothiophene (BDT)
合成了一种基于二维(2D)共轭烷基噻吩基取代噻吩并[2,3- f ]苯并呋喃(TBF)和噻吩并吡咯烷酮(TPD)单元的新型供体-受体型共轭聚合物(PTBFTPD),并将其用作本体供体材料异质结聚合物太阳能电池。作为比较,其对应的基于烷基噻吩基取代的噻吩并[2,3- f还合成了]苯并噻吩(BDT)和TPD单元。对两种聚合物的热学性质,光学和电化学性质,能级,分子链取向堆叠行为和光伏性质进行了深入研究。两种聚合物均显示出相似的光学性质。与PBDTTPD相比,PTBFTPD在溶液和薄膜中显示出相似的吸收特性。PTBFTPD的带隙略窄,为1.83 eV,而PBDTTPD的带隙为1.85 eV。PTBFTPD显示出更深的最高占据分子轨道(HOMO)能级(-5.64 eV),比PBDTTPD低了0.1 eV。XRD研究表明,PTBFTPD具有比PBDTTPD更近的π-π堆积。在各种条件下研究了光伏性能
Synergistic effect of side-chain and backbone engineering in thieno[2,3-<i>f</i>]benzofuran-based conjugated polymers for high performance non-fullerene organic solar cells
作者:Keke Dou、Xunchang Wang、Zurong Du、Huanxiang Jiang、Feng Li、Mingliang Sun、Renqiang Yang
DOI:10.1039/c8ta07544a
日期:——
A series of copolymers containing thieno[2,3-f]benzofuran unit with different alkyl side chains are synthesized. The best photovoltaic performance with power conversion efficiency over 11% have been realized.