Side-Chain-Promoted Benzodithiophene-based Conjugated Polymers toward Striking Enhancement of Photovoltaic Properties for Polymer Solar Cells
Side-Chain-Promoted Benzodithiophene-based Conjugated Polymers toward Striking Enhancement of Photovoltaic Properties for Polymer Solar Cells
复制标题
侧链促进的苯并二噻吩基共轭聚合物可显着增强聚合物太阳能电池的光伏性能
DOI：
10.1021/acsami.8b16554
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Renqiang Yang
中科院分区：
文献类型：
--
作者：
Weichao Chen;Gongyue Huang;Xiaoming Li;Huan Wang;Yonghai Li;Huanxiang Jiang;Nan Zheng;Renqiang Yang
In this work, we have reported a highly efficient photovoltaic material, PBDTTz-SBP, by fine-tuning the side chains of the benzodithiophene (BDT) unit. With the replacement of alkoxy chains with alkylthio chains, a large increase in power conversion efficiency (PCE) was realized. Non-fullerene polymer solar cells (PSCs) without any posttreatment generate an optimal PCE of up to 12.09%, with a high VOC of 0.914 V, JSC of 18.52 mA cm−2, and fill factor of 71.43%. Notably, the efficiency of a PBDTTz-SBP-based solar cell was about 1.31-fold of the PCE (9.20%) of its counterpart based on the polymer, PBDTTz-BP, with alkoxy chains, indicating the striking modulation effect of side-chain engineering. Although VOC and JSC were lower than those of non-fullerene devices, the PSCs with PC71BM as the acceptor exhibited a fairly high fill factor of up to 76.69%, affording a moderate PCE. Our work reported a highly efficient polymer solar cell with a PCE of 12.09% and clearly demonstrated the great tuning effect of alkylthio chains on photovoltaic performance.
