To date, organic solar cells (OSCs) with the development of photovoltaic materials have realized high power conversion efficiencies (PCEs) through the solution processing strategy with bulk heterojunction (BHJ) structure, but the BHJ morphology is difficult to control in large-scale fabrication of OSCs. Herein, we report an alternative film-forming technology known as layer-by-layer (LbL). As compared to its BHJ counterpart, LbL presents many unique advantages including controllable “p-i-n” morphology, good charge transport and extraction properties, and great universality. By using the LbL-bladed coating strategy, a high PCE of 16.35% was achieved in the PM6:Y6 OSCs. Notably, a large-area solar module of 11.52 cm² with a geometrical fill factor of over 90% exhibited an outstanding PCE of 11.86%, which represents the highest efficiency of large-area solar modules. The results may pave the way for the fabrication of the photoactive layer in the future industrial production of OSCs.

迄今为止，随着光伏材料的发展，有机太阳能电池（OSC）通过具有体异质结（BHJ）结构的溶液处理策略实现了高功率转换效率（PCE），但是BHJ形态在大规模制造中难以控制。 OSC。本文中，我们报告了另一种称为成层（LbL）的成膜技术。与BHJ同类产品相比，LbL具有许多独特的优势，包括可控的“引脚”形态，良好的电荷传输和提取特性以及广泛的通用性。通过使用LbL刀片涂层策略，在PM6：Y6 OSC中实现了16.35％的高PCE。值得注意的是，一个11.52 cm ²的大面积太阳能模块几何填充系数超过90％的PCE达到11.86％，这是大面积太阳能电池组件的最高效率。结果可为将来的OSC工业生产中光敏层的制造铺平道路。