Exploiting the lability of metal halide perovskites for doping semiconductor nanocomposites
Calcabrini, Mariano (Institute of Science and Technology Austria)
Genç, Aziz (Institut Català de Nanociència i Nanotecnologia)
Liu, Yu (Institute of Science and Technology Austria)
Kleinhanns, Tobias (Institute of Science and Technology Austria)
Lee, Seungho (Institute of Science and Technology Austria)
Dirin, Dmitry N. (ETH Zürich. Department of Chemistry and Applied Biosciences)
Akkerman, Quinten A. (ETH Zürich. Department of Chemistry and Applied Biosciences)
Kovalenko, Maksym V. (Empa Swiss Federal Laboratories for Materials Science and Technology)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Ibáñez, Maria (Institute of Science and Technology Austria)

Date:	2021
Abstract:	Cesium lead halides have intrinsically unstable crystal lattices and easily transform within perovskite and nonperovskite structures. In this work, we explore the conversion of the perovskite CsPbBr into CsPbBr in the presence of PbS at 450 °C to produce doped nanocrystal-based composites with embedded CsPbBr nanoprecipitates. We show that PbBr is extracted from CsPbBr and diffuses into the PbS lattice with a consequent increase in the concentration of free charge carriers. This new doping strategy enables the adjustment of the density of charge carriers between 10 19 and 10 20 cm -3, and it may serve as a general strategy for doping other nanocrystal-based semiconductors.
Grants:	European Commission 665385 European Commission 823717 European Commission 819740 European Commission 862656 Ministerio de Economía y Competitividad SEV-2017-0706 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Nanocomposites ; Electrical conductivity ; Phase transitions ; Perovskites ; Doping
Published in:	ACS energy letters, Vol. 6, issue 2 (Feb. 2021) , p. 581-587, ISSN 2380-8195

DOI: 10.1021/acsenergylett.0c02448
PMID: 33614964

7 p, 4.9 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles