Removable Additive Assists Blade‐Coated Large‐Area Organic Solar Cell Modules Fabricated with Non‐Halogenated Solvents Achieving Efficiency Over 16%

• DOI: 10.1002/adfm.202401558
• Publication Date: 2024-03-24T15:28:30Z
• Authors: Zekun Liu; Yingying Fu; Jiang Wu; Xueting Yi; Mengan Zhao; Minghui Huang; Jian Liu; Zhiyuan Xie
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract The critical step in commercializing organic solar cells (OSCs) involves achieving high‐performance modules through environmentally friendly solvents. incorporation of solid additives, recognized as an effective method for modulating the morphology active layers layer‐by‐layer (LBL) deposition, plays a significant role. Here, novel volatile additive is introduced individually into non‐halogenated solution donor PM6 morphology‐modulating agent. induces conformational and crystalline orientation change PM6, resulting enhanced balanced charge transport layer. With focus on exciton dynamics, optimized layer inhibits formation low‐energy triplet states. It facilitates strong reverse hole transfer processes, leading to more efficient dissociation. final small‐area LBL blade‐coated OSCs fabricated under ambient conditions achieve power conversion efficiency (PCE) 18.42%. Furthermore, large‐area module with area 28.82 cm 2 manufactured, PCE 16.04% high geometric fill factor 93.8%. This highlights modulation use additives provides successful strategy fabricating OSC