Open AccessSuperior Textured Film and Process Tolerance Enabled by Intermediate‐State Engineering for High‐Efficiency Perovskite Solar Cells
Author(s) -
Wang Shubo,
Chen Yiqi,
Li Ruiyi,
Xu Yibo,
Feng Jiangshan,
Yang Dong,
Yuan Ningyi,
Zhang WenHua,
Liu Shengzhong Frank,
Ding Jianning
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201903009
Subject(s) - energy conversion efficiency , materials science , passivation , perovskite (structure) , annealing (glass) , open circuit voltage , optoelectronics , short circuit , planar , voltage , nanotechnology , composite material , crystallography , computer science , chemistry , electrical engineering , computer graphics (images) , engineering , layer (electronics)
As the power conversion efficiency (PCE) of perovskite solar cells (PSCs) is increased to as high over 25%, it becomes pre‐eminent to study a scalable process with wide processing window to fabricate large‐area uniform perovskite films with good light‐trapping performance. A stable and uniform intermediate‐state complex film is obtained by using tetramethylene sulfoxide (TMSO), which extends the annealing window to as long as 20 min, promotes the formation of a high‐quality perovskite film with larger grains (over 400 nm) and spontaneously forms the surface texture to result in an improved fill factor and open‐circuit voltage ( V oc ). Moreover, the superior surface texture significantly increases the long‐wavelength response, leading to an improved short‐circuit current density ( J sc ). As a result, the maximum PCE of 21.14% is achieved based on a simple planar cell structure without any interface passivation. Moreover, a large area module with active area of 6.75 cm 2 is assembled using the optimized TMSO process, showing efficiency as high as 16.57%. The study paves the way to the rational design of highly efficient PSCs for potential scaled‐up production.