WFRF:(Choi Jin Young)
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Pseudo-halide anion engineering for α-FAPbI3 perovskite solar cells
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- Jeong, Jaeki (författare)
- Ulsan Natl Inst Sci & Technol UNIST, Sch Energy & Chem Engn, Dept Energy Engn, Ulsan, South Korea.;Ecole Polytech Fed Lausanne EPFL, Lab Photon & Interfaces, Inst Chem Sci & Engn, Lausanne, Switzerland
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- Kim, Minjin (författare)
- Korea Inst Energy Res KIER, Ulsan, South Korea
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- Seo, Jongdeuk (författare)
- Ulsan Natl Inst Sci & Technol UNIST, Sch Energy & Chem Engn, Dept Energy Engn, Ulsan, South Korea
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- Ulsan Natl Inst Sci & Technol UNIST, Sch Energy & Chem Engn, Dept Energy Engn, Ulsan, South Korea;Ecole Polytech Fed Lausanne EPFL, Lab Photon & Interfaces, Inst Chem Sci & Engn, Lausanne, Switzerland Korea Inst Energy Res KIER, Ulsan, South Korea (creator_code:org_t)
- 2021-04-05
- 2021
- Engelska.
- Ingår i: Nature. - : Springer Nature. - 0028-0836 .- 1476-4687. ; 592:7854, s. 381-385
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Metal halide perovskites of the general formula ABX(3)-where A is a monovalent cation such as caesium, methylammonium or formamidinium; B is divalent lead, tin or germanium; and X is a halide anion-have shown great potential as light harvesters for thin-film photovoltaics(1-5). Among a large number of compositions investigated, the cubic a-phase of formamidinium lead triiodide (FAPbI(3)) hasemerged as the most promising semiconductor for highly efficient and stable perovskite solar cells(6-9), and maximizing the performance of this material in such devices is of vital importance for the perovskite researchcommunity. Here we introduce an anion engineering concept that uses the pseudo-halide anion formate (HCOO-) to suppress anion-vacancy defects that are present at grain boundaries and at the surface of the perovskite films and to augment the crystallinity of the films. Theresulting solar cell devices attain a power conversion efficiency of 25.6 per cent (certified 25.2 per cent), have long-term operational stability (450 hours) and show intense electroluminescence with external quantum efficiencies of more than 10 per cent. Our findings provide a direct route to eliminate the most abundant and deleterious lattice defects present in metal halide perovskites, providing a facile access to solution-processable films with improved optoelectronic performance.
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- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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