Advancing PTAA-based perovskite photovoltaics through ionic liquid interfacial engineering
Li Q. Wang F. Duan D. Tang B. Wang T. Sun Y. Zhou X. Zhang T. Wang Z. Zhu J. Liu X. Huang X. Tong Y. Lin H. Liu W. Ng A. Wu T. Yuan M. Zhang H. Hu H.
March 2026Elsevier B.V.
Journal of Energy Chemistry
2026#114709 - 720 pp.
Despite the intrinsic durability of polymeric hole transport materials, poly-triarylamines (PTAA)-based inverted perovskite solar cells (PSCs) have lagged behind their counterparts in efficiency, primarily due to poor surface wettability, insufficient interfacial contact, and unfavorable energy level alignment at the PTAA/perovskite interface. Here, we report a highly effective interfacial engineering strategy employing the ionic liquid 1,3-dimethylimidazolium dimethyl phosphate (DMIMPH) as a multifunctional interfacial modifier. The incorporation of DMIMPH improves PTAA wettability, promoting the growth of high-quality perovskite films with enhanced interfacial contact. Concurrently, DMIMPH effectively tunes the energy levels of PTAA, enhances its electrical conductivity, and passivates interfacial defects with more efficient hole extraction and charge transport. Moreover, its interaction with residual PbI2 modulates perovskite crystallization kinetics, yielding highly crystalline perovskite films with enlarged grain sizes, reduced PbI2 residue, and suppressed trap densities. As a result, PTAA-based p-i-n PSCs employing this approach achieve a record certified power conversion efficiency (PCE) of 24.52%, with a champion efficiency of 25.12%—the highest certified value for PTAA-based perovskite devices to date. Impressively, the DMIMPH-modified PSCs without encapsulation maintained 87.48% of their initial efficiency after 1600 h in air. This strategy offers an effective pathway for advancing the performance and stability of polymer-based inverted PSCs.
Crystallinity , Inverted perovskite solar cells , Ionic liquid , PTAA , Wettability
Text of the article Перейти на текст статьи
Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, Guangdong, Shenzhen, 518055, China
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Jilin, Changchun, 130012, China
Research Center for New Energy Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 201800, China
Guangdong Sinoplast Advanced Material Co. Ltd., Guangdong, Dongguan, 523860, China
School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China
Institute of Critical Materials for Integrated Circuits, Shenzhen Polytechnic University, Guangdong, Shenzhen, 518055, China
Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana, 010000, Kazakhstan
Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, Kowloon, 999077, China
College of Chemistry, Nankai University, Tianjin, 300071, China
Hoffmann Institute of Advanced Materials
State Key Laboratory of Supramolecular Structure and Materials
Research Center for New Energy Technology
Guangdong Sinoplast Advanced Material Co. Ltd.
School of Physics Science and Engineering
Institute of Critical Materials for Integrated Circuits
Department of Electrical and Computer Engineering
Department of Applied Physics
College of Chemistry
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026