High‐Efficiency and Mechanically Robust All‐Polymer Organic Photovoltaic Cells Enabled by Optimized Fibril Network Morphology

• DOI: 10.1002/adma.202208926
• Publication Date: 2022-12-20T07:50:19Z
• Authors: Lijiao Ma; Yong Cui; Jianqi Zhang; Kaihu Xian; Zhihao Chen; Kangkang Zhou; Tao Zhang; Wenxuan Wang; Huifeng Yao; Shaoqing Zhang; Xiaotao Hao; Long Ye; Jianhui Hou
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

All-polymer organic photovoltaic (OPV) cells possessing high performance and mechanical robustness are promising candidates for flexible wearable devices. However, developing photoactive materials with good properties so far remains challenging. In this work, a polymer donor PBDB-TF weight-average molecular weight (Mw ) is introduced to enable highly efficient all-polymer OPV featuring excellent reliability. By incorporating the high-Mw as third component into PBQx-TF:PY-IT blend, bulk heterojunction morphology finely tuned more compact π-π stacking distance, affording pathways charge transport well stress dissipation. Hence, based on ternary blend film demonstrate maximum power conversion efficiency (PCE) of 18.2% an outstanding fill factor 0.796. The cell delivers decent PCE 16.5% stability. These results present strategy address boost cells.