Synergistic Optimization Enables Large‐Area Flexible Organic Solar Cells to Maintain over 98% PCE of the Small‐Area Rigid Devices

• DOI: 10.1002/adma.202005153
• Publication Date: 2020-11-05T08:33:30Z
• Authors: Guodong Wang; Jianqi Zhang; Chen Yang; Yuheng Wang; Yi Xing; Muhammad Abdullah...; Yang Yang; Lijun Tian; Ming Su; Wuqiang Shang; Kun Lu; Zhigang Shuai; Zhixiang Wei
• Keywords: Bend radius; Flexible display; Active layer

Abstract Slot‐die coating is generally regarded as the most effective large‐scale methodology for fabrication of organic solar cells (OSCs). However, corresponding device performance significantly lags behind spin‐coated devices. Herein, active layer morphology, flexible substrate properties, and processing temperature are optimized synergistically to obtain high power conversion efficiency (PCE) both single modules. As a result, 1 cm 2 devices produce an excellent PCE 12.16% compared 12.37% small‐area (0.04 ) rigid Likewise, modules with area 25 , extraordinary 10.09% observed. Hence, losses associated upscaling reduced by synergistic optimization. Moreover, after 1000 bending cycles at radius 10 mm, still over 99% their initial PCE, whereas being stored 6000 h in glove box, reaches 103% its value, indicating flexibility well superior shelf stability. These results, thus, promising confirmation great potential large‐area OSCs near future.