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Long Electron-Hole Diffusion Length in High-Quality Lead-Free Double Perovskite Films
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Nanjing Tech Univ, Peoples R China.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
Nanyang Technol Univ, Singapore.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
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2018 (English)In: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 30, no 20, article id 1706246Article in journal (Refereed) Published
Abstract [en]

Developing environmentally friendly perovskites has become important in solving the toxicity issue of lead-based perovskite solar cells. Here, the first double perovskite (Cs2AgBiBr6) solar cells using the planar structure are demonstrated. The prepared Cs2AgBiBr6 films are composed of high-crystal-quality grains with diameters equal to the film thickness, thus minimizing the grain boundary length and the carrier recombination. These high-quality double perovskite films show long electron-hole diffusion lengths greater than 100 nm, enabling the fabrication of planar structure double perovskite solar cells. The resulting solar cells based on planar TiO2 exhibit an average power conversion efficiency over 1%. This work represents an important step forward toward the realization of environmentally friendly solar cells and also has important implications for the applications of double perovskites in other optoelectronic devices.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2018. Vol. 30, no 20, article id 1706246
Keywords [en]
double perovskite; lead free; long diffusion length; planar solar cell
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-148245DOI: 10.1002/adma.201706246ISI: 000431961600010PubMedID: 29603457OAI: oai:DiVA.org:liu-148245DiVA, id: diva2:1213408
Note

Funding Agencies|Joint NTU-LiU PhD programme on Materials- and Nanoscience; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO Mat LiU) [200900971]; European Commission Marie Sklodowska-Curie actions [691210]; European Commission SOLAR-ERA.NET; Swedish Energy Agency (Energimyndigheten); Swedish Research Council (FORMAS); China Scholarship Council; Singapore Ministry of Education Academic Research Fund [RG101/15, RG173/16, MOE2014-T2-1-044, MOE2015-T2-2-015, MOE2016-T2-1-034]; Singapore National Research Foundation [NRF-CRP14-2014]; Knut and Alice Wallenberg (KAW) Foundation [2016.0358]

Available from: 2018-06-04 Created: 2018-06-04 Last updated: 2018-06-26

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