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Highly Efficient and Stable Solar Cells with 2D MA 3 Bi 2 I 9 /3D MAPbI 3 Heterostructured Perovskites
Author(s) -
Hu Yanqiang,
Qiu Ting,
Bai Fan,
Ruan Wei,
Zhang Shufang
Publication year - 2018
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.201703620
Subject(s) - materials science , perovskite (structure) , heterojunction , nanocrystalline material , halide , nanotechnology , bismuth , photovoltaics , nanocrystal , chemical engineering , optoelectronics , photovoltaic system , inorganic chemistry , chemistry , engineering , ecology , metallurgy , biology
Organic–inorganic hybrid lead halide perovskites are emerging as highly promising candidates for highly efficient thin film photovoltaics due to their excellent optoelectronic properties and low‐temperature process capability. However, the long‐term stability in ambient air still is a key issue limiting their further practical applications. Herein, the enhancement of both performance and stability of perovskite solar cells is reported by employing 2D and 3D heterostructured perovskite films with unique nanoplate/nanocrystalline morphology. The 2D/3D heterostructured perovskites combine advantages of the high‐performance lead‐based perovskite 3D CH 3 NH 3 PbI 3 (MAPbI 3 ) and the air‐stable bismuth‐based quasi‐perovskite 2D MA 3 Bi 2 I 9 . In the 2D/3D heterostructure, the hydrophobic MA 3 Bi 2 I 9 platelets vertically situate between the MAPbI 3 grains, forming a lattice‐like structure to tightly enclose the 3D MAPbI 3 perovskite grains. The solar cell based on the optimal 2D/3D (9.2%) heterostructured film achieves a high efficiency of 18.97%, with remarkably reduced hysteresis and significantly improved stability. The work demonstrates that construction of 2D/3D heterostructured films by hybridizing different species of perovskite materials is a feasible way to simultaneously enhance both efficiency and stability of perovskite solar cells.