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Synergic Interface Optimization with Green Solvent Engineering in Mixed Perovskite Solar Cells
Author(s) -
Bu Tongle,
Wu Lan,
Liu Xueping,
Yang Xiaokun,
Zhou Peng,
Yu Xinxin,
Qin Tianshi,
Shi Jiangjian,
Wang Song,
Li Saisai,
Ku Zhiliang,
Peng Yong,
Huang Fuzhi,
Meng Qingbo,
Cheng YiBing,
Zhong Jie
Publication year - 2017
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.201700576
Subject(s) - chlorobenzene , perovskite (structure) , halide , materials science , solvent , chemical engineering , layer (electronics) , deposition (geology) , energy conversion efficiency , nanotechnology , inorganic chemistry , optoelectronics , organic chemistry , catalysis , chemistry , engineering , paleontology , sediment , biology
Organic–inorganic hybrid halide perovskite solar cells (PSCs) have recently drawn enormous attentions due to their impressive performance (>22%) and low temperature solution processability (<150 °C). Current solution process involves application of a large amount of toxic solvents, such as chlorobenzene, which is heavily employed in both the perovskite layer and the hole transport layer (HTL) deposition. Herein, this study employs green solvent of ethyl acetate for engineering efficient perovskite and HTL layers, which enables a synergic interface (perovskite/HTL) optimization. A champion efficiency of 19.43% is obtained for small cells (0.16 cm 2 with mask) and over 14% for large size modules (5 × 5 cm 2 ). The PSCs prepared from the green solvent engineering demonstrate superior performance on both efficiency and stability over their chlorobenzene counterparts. These enhancements are ascribed to the in situ inhibition on carrier recombination induced by interfacial defects during the solution processing, which enables about 2/3 reduction of calculated recombination rate. Thus, the green solvent route shows the great potential toward environmental‐friendly manufacturing.