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Title: Sn(IV)-free tin perovskite films realized by in situ Sn(0) nanoparticle treatment of the precursor solution
Authors: Nakamura, Tomoya  kyouindb  KAKEN_id
Yakumaru, Shinya
Truong, Minh Anh
Kim, Kyusun
Liu, Jiewei
Hu, Shuaifeng
Otsuka, Kento
Hashimoto, Ruito
Murdey, Richard
Sasamori, Takahiro
Kim, Hyung Do
Ohkita, Hideo
Handa, Taketo
Kanemitsu, Yoshihiko  kyouindb  KAKEN_id  orcid (unconfirmed)
Wakamiya, Atsushi
Author's alias: 中村, 智也
藥丸, 信也
チョン, ミンアン
劉, 劼瑋
フ, シュアイフェン
大塚, 健斗
橋本, 塁人
マーディ, リチャード
笹森, 貴裕
大北, 英生
半田, 岳人
金光, 義彦
若宮, 淳志
Keywords: Chemistry
Electronic materials
Inorganic chemistry
Materials chemistry
Organometallic chemistry
Issue Date: 16-Jun-2020
Publisher: Springer Nature
Journal title: Nature Communications
Volume: 11
Thesis number: 3008
Abstract: The toxicity of lead perovskite hampers the commercialization of perovskite-based photovoltaics. While tin perovskite is a promising alternative, the facile oxidation of tin(II) to tin(IV) causes a high density of defects, resulting in lower solar cell efficiencies. Here, we show that tin(0) nanoparticles in the precursor solution can scavenge tin(IV) impurities, and demonstrate that this treatment leads to effectively tin(IV)-free perovskite films with strong photoluminescence and prolonged decay lifetimes. These nanoparticles are generated by the selective reaction of a dihydropyrazine derivative with the tin(II) fluoride additive already present in the precursor solution. Using this nanoparticle treatment, the power conversion efficiency of tin-based solar cells reaches 11.5%, with an open-circuit voltage of 0.76 V. Our nanoparticle treatment is a simple and broadly effective method that improves the purity and electrical performance of tin perovskite films.
Description: 高純度スズ系ペロブスカイト半導体膜の作製法を確立 --4価のスズ不純物を取り除くスカベンジャー法の開発--. 京都大学プレスリリース. 2020-06-16.
Rights: © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
DOI(Published Version): 10.1038/s41467-020-16726-3
PubMed ID: 32546736
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