Key Laboratory for Functional Polymer Materials and Centre for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
J Am Chem Soc. 2013 Jun 12;135(23):8484-7. doi: 10.1021/ja403318y. Epub 2013 May 28.
Three small molecules named DR3TBDTT, DR3TBDTT-HD, and DR3TBD2T with a benzo[1,2-b:4,5-b']dithiophene (BDT) unit as the central building block have been designed and synthesized for solution-processed bulk-heterojunction solar cells. Power conversion efficiencies (PCEs) of 8.12% (certified 7.61%) and 8.02% under AM 1.5G irradiation (100 mW cm(-2)) have been achieved for DR3TBDTT- and DR3TBDT2T-based organic photovoltaic devices (OPVs) with PC71BM as the acceptor, respectively. The better PCEs were achieved by improving the short-circuit current density without sacrificing the high open-circuit voltage and fill factor through the strategy of incorporating the advantages of both conventional small molecules and polymers for OPVs.
三种小分子化合物，即 DR3TBDTT、DR3TBDTT-HD 和 DR3TBD2T，以苯并[1,2-b:4,5-b']二噻吩（BDT）单元作为中心构建块，被设计和合成用于溶液处理的体异质结太阳能电池。基于 DR3TBDTT 和 DR3TBD2T 的有机光伏器件（OPVs）与 PC71BM 作为受体，在 AM 1.5G 照射（100 mW cm(-2))下，分别实现了 8.12%（经认证为 7.61%）和 8.02%的功率转换效率（PCE）。通过结合传统小分子和聚合物的优势来提高短路电流密度，同时不牺牲高开路电压和填充因子，从而实现了更好的 PCE。
