Exploiting the donor‐acceptor‐additive interaction's morphological effect on the performance of organic solar cells
Lu Chen,
Ruijie Ma,
Jicheng Yi,
Top Archie Dela Peña,
Hongxiang Li,
Qi Wei,
Cenqi Yan,
Jiaying Wu,
Mingjie Li,
Pei Cheng,
He Yan,
Guangye Zhang,
Gang Li
Affiliations
Lu Chen
College of New Materials and New Energies Shenzhen Technology University Shenzhen China
Ruijie Ma
Department of Electrical and Electronic Engineering Research Institute for Smart Energy (RISE) Photonic Research Institute (PRI) The Hong Kong Polytechnic University Hong Kong China
Jicheng Yi
Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology Hong Kong China
Top Archie Dela Peña
Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology Hong Kong China
Hongxiang Li
College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
Qi Wei
Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China
Cenqi Yan
College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
Jiaying Wu
The Hong Kong University of Science and Technology, Function Hub, Advanced Materials Thrust Guangzhou P.R. China
Mingjie Li
Department of Applied Physics The Hong Kong Polytechnic University Hong Kong China
Pei Cheng
College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu China
He Yan
Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology Hong Kong China
Guangye Zhang
College of New Materials and New Energies Shenzhen Technology University Shenzhen China
Gang Li
Department of Electrical and Electronic Engineering Research Institute for Smart Energy (RISE) Photonic Research Institute (PRI) The Hong Kong Polytechnic University Hong Kong China
Abstract Organic solar cells (OSCs) have demonstrated over 19% power conversion efficiency (PCE) with the help of material innovation and device optimization. Co‐working with newly designed materials, traditional solvent additives, 1‐chloronaphthalene (CN), and 1,8‐diodooctane (DIO) are still powerful in morphology modulation towards satisfying efficiencies. Here, we chose recently reported high‐performance polymer donors (PM6 & D18‐Fu) and small molecular acceptors (Y6 & L8‐BO) as active layer materials and processed them by different conditions (CN or DIO or none). Based on corresponding 12 groups of device results, and their film morphology characterizations (both ex‐situ and in‐situ ones), the property‐performance relationships are revealed case by case. It is thereby supposed to be taken as a successful attempt to demonstrate the importance and complexity of donor‐acceptor‐additive interaction, since the device performance and physics analyses are also tightly combined with morphology variation. Furthermore, ternary blend construction for PCE improvement provides an approaching 19% level and showcases the potential of understanding‐guided‐optimization (UGO) in the future of OSCs.
