Non-Fullerene-Acceptor-Based Bulk-Heterojunction Organic Solar Cells with Efficiency over 7%
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- 作者：Dan Sun ; Dong Meng ; Yunhao Cai ; Bingbing Fan ; Yan Li ; Wei Jiang ; Lijun Huo ; Yanming Sun ; Zhaohui Wang
- 刊名：Journal of the American Chemical Society
- 出版年：2015
- 出版时间：September 2, 2015
- 年：2015
- 卷：137
- 期：34
- 页码：11156-11162
- 全文大小：502K
- ISSN：1520-5126
文摘
A novel perylene bisimide (PBI) dimer-based acceptor material, SdiPBI-S, was developed. Conventional bulk-heterojunction (BHJ) solar cells based on SdiPBI-S and the wide-band-gap polymer PDBT-T1 show a high power conversion efficiency (PCE) of 7.16% with a high open-circuit voltage of 0.90 V, a high short-circuit current density of 11.98 mA/cm2, and an impressive fill factor of 66.1%. Favorable phase separation and balanced carrier mobilites in the BHJ films account for the high photovoltaic performance. The results demonstrate that fine-tuning of PBI-based materials is a promising way to improve the PCEs of non-fullerene BHJ organic solar cells.