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Inorganic CsPbI3 Perovskite Coating on PbS Quantum Dot for Highly Efficient and Stable Infrared Light Converting Solar Cells
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China..
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2018 (English)In: Advanced Energy Materials, ISSN 1614-6832, Vol. 8, no 6, article id 1702049Article in journal (Refereed) Published
Abstract [en]

Solution-processed colloidal quantum dot (CQD) solar cells harvesting the infrared part of the solar spectrum are especially interesting for future use in semitransparent windows or multilayer solar cells. To improve the device power conversion efficiency (PCE) and stability of the solar cells, surface passivation of the quantum dots is vital in the research of CQD solar cells. Herein, inorganic CsPbI3 perovskite (CsPbI3-P) coating on PbS CQDs with a low-temperature, solution-processed approach is reported. The PbS CQD solar cell with CsPbI3-P coating gives a high PCE of 10.5% and exhibits remarkable stability both under long-term constant illumination and storage under ambient conditions. Detailed characterization and analysis reveal improved passivation of the PbS CQDs with the CsPbI3-P coating, and the results suggest that the lattice coherence between CsPbI3-P and PbS results in epitaxial induced growth of the CsPbI3-P coating. The improved passivation significantly diminishes the sub-bandgap trap-state assisted recombination, leading to improved charge collection and therefore higher photovoltaic performance. This work therefore provides important insight to improve the CQD passivation by coating with an inorganic perovskite ligand for photovoltaics or other optoelectronic applications.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2018. Vol. 8, no 6, article id 1702049
Keywords [en]
charge recombination, inorganic perovskite, quantum dots, solar cells, surface passivation
National Category
Physical Chemistry Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-348982DOI: 10.1002/aenm.201702049ISI: 000426152400017OAI: oai:DiVA.org:uu-348982DiVA, id: diva2:1201870
Funder
Swedish Energy AgencySwedish Research CouncilSwedish Research Council FormasAvailable from: 2018-04-26 Created: 2018-04-26 Last updated: 2018-05-16Bibliographically approved

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Zhang, XiaoliangPhuyal, DibyaTian, LeiÖberg, Viktor A.Johansson, Malin BCappel, Ute B.Karis, OlofRensmo, HåkanBoschloo, GerritJohansson, Erik M. J.

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Zhang, XiaoliangPhuyal, DibyaTian, LeiÖberg, Viktor A.Johansson, Malin BCappel, Ute B.Karis, OlofRensmo, HåkanBoschloo, GerritJohansson, Erik M. J.
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Physical ChemistryMolecular and Condensed Matter Physics
Physical ChemistryCondensed Matter Physics

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