材料科学
光伏系统
堆积
聚合物
聚合物太阳能电池
有机太阳能电池
能量转换效率
纳米技术
化学工程
光电子学
复合材料
有机化学
生态学
化学
生物
工程类
作者
Lijiao Ma,Yong Cui,Jianqi Zhang,Kaihu Xian,Zhihao Chen,Kangkang Zhou,Tao Zhang,Wenxuan Wang,Huifeng Yao,Shaoqing Zhang,Hao Xin,Long Ye,Jianhui Hou
标识
DOI:10.1002/adma.202208926
摘要
All-polymer organic photovoltaic (OPV) cells possessing high photovoltaic performance and mechanical robustness are promising candidates for flexible wearable devices. However, developing photoactive materials with good mechanical properties and photovoltaic performance so far remains challenging. In this work, a polymer donor PBDB-TF with a high weight-average molecular weight (Mw ) is introduced to enable highly efficient all-polymer OPV cells featuring excellent mechanical reliability. By incorporating the high-Mw PBDB-TF as a third component into the PBQx-TF:PY-IT blend, the bulk heterojunction morphology is finely tuned with a more compact π-π stacking distance, affording efficient pathways for charge transport as well as mechanical stress dissipation. Hence, all-polymer OPV cells based on the ternary blend film demonstrate a maximum power conversion efficiency (PCE) of 18.2% with an outstanding fill factor of 0.796. The flexible OPV cell delivers a decent PCE of 16.5% with high mechanical stability. These results present a promising strategy to address the mechanical properties and boost the photovoltaic performance of all-polymer OPV cells.
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