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Discrete SnO 2 Nanoparticle‐Modified Poly(3,4‐Ethylenedioxythiophene):Poly(Styrenesulfonate) for Efficient Perovskite Solar Cells
Author(s) -
Jia Pengcheng,
Bi Wentao,
Huang Xin,
Li Ling,
Gong Wenwen,
Tang Yang,
Zhao Di,
Hu Yufeng,
Lou Zhidong,
Teng Feng,
Cui Qiuhong,
Hou Yanbing
Publication year - 2019
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900162
Subject(s) - pedot:pss , materials science , perovskite (structure) , crystallinity , nanoparticle , energy conversion efficiency , layer (electronics) , chemical engineering , crystallization , surface modification , nanotechnology , poly(3,4 ethylenedioxythiophene) , optoelectronics , composite material , engineering
Poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is the most widely used hole transport materials for perovskite solar cells (PVSCs) with a p‐i‐n structure. However, the solar cells based on PEDOT:PSS show a low photoconversion efficiency due to the poor crystallinity of a perovskite film on it. Besides, the acidity of PEDOT:PSS performance critically influences the long‐term stability of PVSCs. Herein, a layer of the discrete SnO 2 nanoparticle film is deposited on the surface of PEDOT:PSS to modify the surface of the PEDOT:PSS film. This discrete SnO 2 nanoparticle film acts as the buffer layer between the PEDOT:PSS and MAPbI 3 , which not only improves the crystallization of the quality of the perovskite film, but also provides a selective‐carrier pathway to enhance the extraction of holes and to block the diffusion of electrons. The SnO 2 modified devices show a power conversion efficiency of 18.04%, with a great improvement compared with the 12.24% efficiency of PEDOT:PSS only devices. This work demonstrates that it is possible to enhance the performance of PVSCs via n‐type nanoparticle modification of hole transport layer and provides a new guidance for PVSCs interface modification engineering.