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Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment

Mixed lead–tin (Pb–Sn) halide perovskites with optimum band gaps near 1.3 eV are promising candidates for next-generation solar cells. However, the performance of solar cells fabricated with Pb–Sn perovskites is restricted by the facile oxidation of Sn(ii) to Sn(iv), which induces self-doping. Malto...

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Autores principales: Hu, Shuaifeng, Truong, Minh Anh, Otsuka, Kento, Handa, Taketo, Yamada, Takumi, Nishikubo, Ryosuke, Iwasaki, Yasuko, Saeki, Akinori, Murdey, Richard, Kanemitsu, Yoshihiko, Wakamiya, Atsushi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8528037/
https://www.ncbi.nlm.nih.gov/pubmed/34777771
http://dx.doi.org/10.1039/d1sc04221a
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author Hu, Shuaifeng
Truong, Minh Anh
Otsuka, Kento
Handa, Taketo
Yamada, Takumi
Nishikubo, Ryosuke
Iwasaki, Yasuko
Saeki, Akinori
Murdey, Richard
Kanemitsu, Yoshihiko
Wakamiya, Atsushi
author_facet Hu, Shuaifeng
Truong, Minh Anh
Otsuka, Kento
Handa, Taketo
Yamada, Takumi
Nishikubo, Ryosuke
Iwasaki, Yasuko
Saeki, Akinori
Murdey, Richard
Kanemitsu, Yoshihiko
Wakamiya, Atsushi
author_sort Hu, Shuaifeng
collection PubMed
description Mixed lead–tin (Pb–Sn) halide perovskites with optimum band gaps near 1.3 eV are promising candidates for next-generation solar cells. However, the performance of solar cells fabricated with Pb–Sn perovskites is restricted by the facile oxidation of Sn(ii) to Sn(iv), which induces self-doping. Maltol, a naturally occurring flavor enhancer and strong metal binding agent, was found to effectively suppress Sn(iv) formation and passivate defects in mixed Pb–Sn perovskite films. When used in combination with Sn(iv) scavenging, the maltol surface treatment led to high-quality perovskite films which showed enhanced photoluminescence intensities and charge carrier lifetimes in excess of 7 μs. The scavenging and surface treatments resulted in highly reproducible solar cell devices, with photoconversion efficiencies of up to 21.4% under AM1.5G illumination.
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spelling pubmed-85280372021-11-12 Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment Hu, Shuaifeng Truong, Minh Anh Otsuka, Kento Handa, Taketo Yamada, Takumi Nishikubo, Ryosuke Iwasaki, Yasuko Saeki, Akinori Murdey, Richard Kanemitsu, Yoshihiko Wakamiya, Atsushi Chem Sci Chemistry Mixed lead–tin (Pb–Sn) halide perovskites with optimum band gaps near 1.3 eV are promising candidates for next-generation solar cells. However, the performance of solar cells fabricated with Pb–Sn perovskites is restricted by the facile oxidation of Sn(ii) to Sn(iv), which induces self-doping. Maltol, a naturally occurring flavor enhancer and strong metal binding agent, was found to effectively suppress Sn(iv) formation and passivate defects in mixed Pb–Sn perovskite films. When used in combination with Sn(iv) scavenging, the maltol surface treatment led to high-quality perovskite films which showed enhanced photoluminescence intensities and charge carrier lifetimes in excess of 7 μs. The scavenging and surface treatments resulted in highly reproducible solar cell devices, with photoconversion efficiencies of up to 21.4% under AM1.5G illumination. The Royal Society of Chemistry 2021-09-27 /pmc/articles/PMC8528037/ /pubmed/34777771 http://dx.doi.org/10.1039/d1sc04221a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Hu, Shuaifeng
Truong, Minh Anh
Otsuka, Kento
Handa, Taketo
Yamada, Takumi
Nishikubo, Ryosuke
Iwasaki, Yasuko
Saeki, Akinori
Murdey, Richard
Kanemitsu, Yoshihiko
Wakamiya, Atsushi
Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
title Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
title_full Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
title_fullStr Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
title_full_unstemmed Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
title_short Mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
title_sort mixed lead–tin perovskite films with >7 μs charge carrier lifetimes realized by maltol post-treatment
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8528037/
https://www.ncbi.nlm.nih.gov/pubmed/34777771
http://dx.doi.org/10.1039/d1sc04221a
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