Solution-processed and high-performance organic solar cells using small molecules with a benzodithiophene unit.
Solution-processed and high-performance organic solar cells using small molecules with a benzodithiophene unit.
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DOI：
10.1021/ja403318y
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发表时间：
2013-05
影响因子：
15
通讯作者：
Jiao-yan Zhou;Yi Zuo;Xiangjian Wan;Guankui Long;Qian Zhang;Wang Ni;Yongsheng Liu;Zhi Li;
中科院分区：
文献类型：
--
作者：
Jiao-yan Zhou;Yi Zuo;Xiangjian Wan;Guankui Long;Qian Zhang;Wang Ni;Yongsheng Liu;Zhi Li;
设计并合成了三种以苯并[1，2-B：4，5-b ']二噻吩（BDT）为中心结构单元的小分子DR 3 TBDTT、DR 3 TBDTT-HD和DR 3 TBD 2 T，用于溶液加工的本体异质结太阳能电池。在AM 1.5G（100 mW cm（-2））辐照下，以PC 71 BM为受体的DR 3 TBDTT和DR 3 TBDT 2 T基有机光伏器件（OPV）的功率转换效率分别达到8.12%（认证值为7.61%）和8.02%。通过结合常规小分子和聚合物用于OPV的优点的策略，在不牺牲高开路电压和填充因子的情况下，通过提高短路电流密度来实现更好的PCE。
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.