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Additive‐Induced Synergies of Defect Passivation and Energetic Modification toward Highly Efficient Perovskite Solar Cells
Author(s) -
Xiong Shaobing,
Hou Zhangyu,
Dong Wei,
Li Danqin,
Yang Jianming,
Bai Ruirong,
Wu Yuning,
Li Dong,
Wu Hongbo,
Ma Zaifei,
Xu Jianhua,
Liu Xianjie,
Bao Qinye
Publication year - 2021
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202101394
Subject(s) - passivation , materials science , perovskite (structure) , photovoltaic system , recombination , crystallite , open circuit voltage , carrier lifetime , optoelectronics , energy conversion efficiency , chemical engineering , chemical physics , nanotechnology , voltage , silicon , electrical engineering , chemistry , biochemistry , layer (electronics) , engineering , metallurgy , gene
Abstract Defect passivation via additive and energetic modification via interface engineering are two effective strategies for achieving high‐performance perovskite solar cells (PSCs). Here, the synergies of pentafluorophenyl acrylate when used as additive, in which it not only passivates surface defect states but also simultaneously modifies the energetics at the perovskite/Spiro‐OMeTAD interface to promote charge transport, are shown. The additive‐induced synergy effect significantly suppresses both defect‐assisted recombination and interface carrier recombination, resulting in a device efficiency of 22.42% and an open‐circuit voltage of 1.193 V with excellent device stability. The two photovoltaic parameters are among the highest values for polycrystalline CsFormamidinium/Methylammonium (FAMA)/FAMA based n‐i‐p structural PSCs using low‐cost silver electrodes reported to date. The findings provide a promising approach by choosing the dual functional additive to enhance efficiency and stability of PSCs.