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Targeted Therapy for Interfacial Engineering Toward Stable and Efficient Perovskite Solar Cells
Author(s) -
Wang Shuhui,
Chen Haiyang,
Zhang Jiandong,
Xu Guiying,
Chen Weijie,
Xue Rongming,
Zhang Moyao,
Li Yaowen,
Li Yongfang
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201903691
Subject(s) - materials science , passivation , fullerene , doping , thermal stability , chemical engineering , butyric acid , derivative (finance) , energy conversion efficiency , nanotechnology , layer (electronics) , organic chemistry , optoelectronics , chemistry , economics , financial economics , engineering
The poor long‐term stability of organic–inorganic hybrid halide perovskite solar cells (pero‐SCs) remains a big challenge for their commercialization. Although strategies such as encapsulation, doping, and passivation have been reported, there remains a lack of understanding of the water resistance and thermal stability of pero‐SCs. A fullerene derivative, [6,6]‐phenyl‐C 61 ‐butyric acid‐ N , N ‐dimethyl‐3‐(2‐thienyl)propanam ester (PCBB‐S‐N) containing a functional sulfur atom and C 60, is synthesized and employed as electron transporting layer (ETL)/intermediary layer to targetedly heal the multitype defects in pero‐SCs or assist the growth of ETL, such as [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester (PCBM), in planar p‐i‐n pero‐SCs. The repaired pero‐SCs can not only dramatically improve their power conversion efficiencies, but also address stability issues under moisture and high temperature. The corresponding mechanism of PCBB‐S‐N with targeted therapy effect in a device is systematically investigated by both experiments and theoretical calculation. This work demonstrates that the proposed fullerene derivative with finely tuned chemical structure can be a promising ETL candidate or intermediary to approach stable and efficient planar p‐i‐n pero‐SCs.