Lowering Toxicity of Solvent in Organic Solar Cells Manufacturing for 20% Efficiency
Rui Zeng, Fei Han, Wenkai Zhong, Ming Zhang, Senke Tan, Lin Yi, Jiawei Deng, Guanqing Zhou, Lixuan Kan, Lei Zhu, Xingyu Gao, Jinge Zhu, Wutong Zhao, Shengjie Xu, Xiaonan Xue, Bonan Hao, Zichun Zhou, Xuefei Wu, Cheng Wang, Zachary Fink, Zheng Tang, Hao Jing, Thomas P. Russell, Yongming Zhang, Feng Liu
Abstract
Abstract Thin film organic photovoltaics (OPVs) aim to harness solar energy environmentally friendly, highly efficient, and cost‐effective means, thereby offering a sustainable solution for energy production and ecological preservation. Efforts are undertook to optimize engineering preparation technology for OPV devices and mini‐modules, through the development of low‐ecological‐impact solvent processing method. A newly developed solvent engineering strategy employing environmentally benign o ‐xylene (OXY) with synergistic dual additives (DIM and DIB) achieved an optimal power conversion efficiency (PCE) of 20.0% ( J SC of 26.6 mA cm −2 , V OC of 0.935 V, FF of 80.3%) alongside exceptional stability metrics (82%–1500h). The mini‐module processed with optimized TCE:OXY (1:3 v/v) solvent demonstrated scalable performance reaching 17.6% (18.4 cm 2 ), representing the highest performance achieved in the development safe solvent based OPVs. Suitable microscale patterns contributed to a broader range of receiving angles, enabling more flexible installation geometries for building‐integrated applications.