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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202107729
|2 doi
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|a pubmed24n1107.xml
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|a (DE-627)NLM332170896
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|a (NLM)34676933
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|a DE-627
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|a eng
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|a Cao, Jiupeng
|e verfasserin
|4 aut
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|a High-Performance Tin-Lead Mixed-Perovskite Solar Cells with Vertical Compositional Gradient
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|c 2022
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 10.02.2022
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2021 Wiley-VCH GmbH.
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|a Sn-Pb mixed perovskites with bandgaps in the range of 1.1-1.4 eV are ideal candidates for single-junction solar cells to approach the Shockley-Queisser limit. However, the efficiency and stability of Sn-Pb mixed-perovskite solar cells (PSCs) still lag far behind those of Pb-based counterparts due to the easy oxidation of Sn2+ . Here, a reducing agent 4-hydrazinobenzoic acid is introduced as an additive along with SnF2 to suppress the oxidation of Sn2+ . Meanwhile, a vertical Pb/Sn compositional gradient is formed spontaneously after an antisolvent treatment due to different solubility and crystallization kinetics of Sn- and Pb-based perovskites and it can be finely tuned by controlling the antisolvent temperature. Because the band structure of a perovskite is dependent on its composition, graded vertical heterojunctions are constructed in the perovskite films with a compositional gradient, which can enhance photocarrier separation and suppress carrier recombination in the resultant PSCs. Under optimal fabrication conditions, the Sn-Pb mixed PSCs show power conversion efficiency up to 22% along with excellent stability during light soaking
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|a Journal Article
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|a Sn-Pb mixed perovskite
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|a compositional gradients
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|a heterojunctions
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|a perovskite solar cells
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|a Loi, Hok-Leung
|e verfasserin
|4 aut
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|a Xu, Yang
|e verfasserin
|4 aut
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|a Guo, Xuyun
|e verfasserin
|4 aut
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|a Wang, Naixiang
|e verfasserin
|4 aut
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|a Liu, Chun-Ki
|e verfasserin
|4 aut
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|a Wang, Tianyue
|e verfasserin
|4 aut
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|a Cheng, Haiyang
|e verfasserin
|4 aut
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|a Zhu, Ye
|e verfasserin
|4 aut
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|a Li, Mitch Guijun
|e verfasserin
|4 aut
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|a Wong, Wai-Yeung
|e verfasserin
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| 700 |
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|a Yan, Feng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 34(2022), 6 vom: 03. Feb., Seite e2107729
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:34
|g year:2022
|g number:6
|g day:03
|g month:02
|g pages:e2107729
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|u http://dx.doi.org/10.1002/adma.202107729
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