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Stability Improvement of Perovskite Solar Cells by Adding Sb‐Xanthate to Precursor Solution
Author(s) -
Nam Kyung-Su,
Krishnamurthy Suvratha,
Qing Shen,
Toyoda Taro,
Yoshino Kenji,
Minemoto Takashi,
Ma Tingli,
Pandey Shyam,
Hayase Shuzi
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202000144
Subject(s) - xanthate , passivation , x ray photoelectron spectroscopy , layer (electronics) , materials science , solar cell , inorganic chemistry , substrate (aquarium) , chemical engineering , perovskite (structure) , tin oxide , oxide , chemistry , polymer chemistry , nanotechnology , metallurgy , optoelectronics , oceanography , geology , engineering
Herein, it is reported that the stability of a halogenated perovskite (PVK) solar cell consisting of an fluorine‐doped tin oxide (FTO) substrate/TiO 2 /CH 3 NH 3 PbI 3 / N 2 , N 2 , N 2′ , N 2′ , N 7 , N 7 , N 7′ , N 7′ ‐octakis(4‐methoxyphenyl)‐9,9′‐spirobi[9 H ‐fluorene]‐2,2′,7,7′‐tetramine/Ag/Au structure is improved by adding Sb‐xanthate to the PVK layer without large loss of efficiency. The Sb‐element‐rich layer is observed on top of the PVK layer. From the X‐ray photoelectron spectroscopy (XPS) study, it is concluded that an inorganic Sb x O y passivation layer on the PVK layer is prepared by baking the solution of the Sb‐xanthate and the PVK precursor. The inorganic layer prevents moisture and oxygen from penetrating into the PVK layer. This article provides a new method to obtain a passivation layer on a PVK layer by baking a mixture solution in one step for improving solar cell stability.