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In situ growth of perovskite stacking layers for high-efficiency carbon-based hole conductor free perovskite solar cells
Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China.
Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry. Mandalay Univ, Res Lab, Dept Phys Mat Sci, Mandalay, Myanmar.ORCID iD: 0000-0001-8740-665X
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
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2019 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 7, no 22, p. 13777-13786Article in journal (Refereed) Published
Abstract [en]

The interfacial properties between a perovskite layer and carbon electrode are critical for the photovoltaic performance of carbon electrode-based perovskite solar cells (PSCs). Herein, a methylammonium lead mixed halide (MAPbIxBr3−x) perovskite layer is in situ grown on the top of a methylammonium lead iodide (MAPbI3) perovskite layer forming a MAPbI3/MAPbIxBr3−x perovskite stacking structure (PSS) to improve the interfacial properties at the perovskite/carbon electrode interface. The charge carrier dynamics in both the perovskite and the PSC device induced by the MAPbIxBr3−x perovskite stacking layer are studied using extensive characterization. The charge interfacial recombination at the perovskite/carbon electrode interface is significantly diminished using the PSS within the PSC, resulting in largely improved charge extraction and therefore high photovoltaic performance. The PSS-based PSC shows a power conversion efficiency of up to 16.2% (increased by 43% compared with that of a conventional MAPbI3-based PSC), which is among the highest efficiencies of carbon electrode-based hole conductor free PSCs. Meanwhile, the PSS-based PSC also exhibits good stability under both continuous illumination and storage under dark conditions. This work may provide a new avenue to fine tune the interfacial properties of carbon electrode-based PSCs for further improving their photovoltaic performance.

Place, publisher, year, edition, pages
2019. Vol. 7, no 22, p. 13777-13786
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Materials Chemistry Physical Chemistry
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URN: urn:nbn:se:uu:diva-388769DOI: 10.1039/c9ta02772fISI: 000470928800035OAI: oai:DiVA.org:uu-388769DiVA, id: diva2:1335572
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Swedish Energy AgencySwedish Research Council FormasSwedish Research CouncilGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of TechnologyAvailable from: 2019-07-05 Created: 2019-07-05 Last updated: 2019-07-05Bibliographically approved

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Kyi Thein, NanTian, LeiJohansson, Erik M. J.

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