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Planar FAPbBr(3) Solar Cells with Power Conversion Efficiency above 10%
DUT, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, Inst Artificial Photosynth, Dalian 116024, Peoples R China..
DUT, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, Inst Artificial Photosynth, Dalian 116024, Peoples R China..
DUT, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem, Inst Artificial Photosynth, Dalian 116024, Peoples R China..
Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China..
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2018 (English)In: ACS ENERGY LETTERS, ISSN 2380-8195, Vol. 3, no 8, p. 1808-1814Article in journal (Refereed) Published
Abstract [en]

Bromide-based hybrid perovskites are of particular interest not only due to the fact that they offer a way to go beyond the Shockley-Queisser limit via the tandem cell scheme but single junction devices of them can also achieve reasonably high efficiency with high stability for solar energy conversion. However, the highest power conversion efficiency achieved up to now for FAPbBr(3) single-junction solar cells is only 8.2%, which is far below the efficiency of-17% predicted from detailed balance analysis. Here, a two-step method (the intermolecule exchange pathway) was systematically optimized for the fabrication of high quality FAPbBr(3) films. A molecule of urea, structurally similar to formamidinium, is introduced as an additive to tune the intermolecular ion exchange procedure. SnO2 is introduced as an electron-selective contact to the planar structured FAPbBr(3) solar cells. As a result, a power conversion efficiency of 10.61% and a V-oc of 1.56 V are achieved with planar structured solar cells, both of which represent the highest value ever reported for FAPbBr(3) solar cells.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018. Vol. 3, no 8, p. 1808-1814
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:kth:diva-234631DOI: 10.1021/acsenergylett.8b00540ISI: 000441852800005Scopus ID: 2-s2.0-85049632835OAI: oai:DiVA.org:kth-234631DiVA, id: diva2:1247793
Funder
Swedish Energy Agency
Note

QC 20180913

Available from: 2018-09-13 Created: 2018-09-13 Last updated: 2018-09-13Bibliographically approved

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