Fluid Mechanics Inspired Sequential Blade-Coating for High-Performance Large-Area Organic Solar Modules
Ben Zhang 1 , Fu Yang 1 , Shanshan Chen 2,* （陈姗姗）, Haiyang Chen 1 , Guang Zeng 1 , Yunxiu Shen 1 , Yaowen Li 1, 3, *（李耀文）, Yongfang Li 1, 4
1 Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor‐optoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 P. R. China
2 School of Energy & Power Engineering MOE Key Laboratory of Low‐Grade Energy Utilization Technologies and Systems CQU‐NUS Renewable Energy Materials & Devices Joint Laboratory Chongqing University Chongqing 400044 P. R. China
3 State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Soochow University Suzhou 215123 P. R. China
4 Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
Adv. Funct. Mater. 2022, 32, 2202011
Despite rapid advances in the field of organic solar cells (OSCs), high-performance large-scale OSC modules are limited. In this study, it is found that the non-Newtonian fluid feature of conjugated polymer primarily causes the wedge-shaped mass (donor and/or acceptor component)/phase distribution of blends in large-scale blade coating, which results in the lower module efficiency. To address the critical issue in printing manufacturing, a reversible and sequential layer-by-layer (RS-LBL) deposition method with sequential twice forward/reverse blade-coating of polymer donor and forward blade-coating of Y6 acceptor, is developed for precisely controlling fluid mechanics of PM6:Y6 active layer. Through using the RS-LBL strategy, uniform morphology and favorable phase separation and crystallization are obtained in the 10 × 10 cm2 active layer. As a result, the RS-LBL-based OSCs show excellent operational stability, and an outstanding PCE of 13.47% is achieved with significantly suppressed charge recombination losses in the 36 cm2 large-area OSC module, which represents the highest efficiency of binary solar modules with the area over 30 cm2. This study provides a feasible route for the next generation of high-performance large-area OSCs and OSC modules.
链接：//onlinelibrary.wiley.com/doi/10.1002/adfm.202202011
