Exploiting the Lability of Metal Halide Perovskites for Doping Semiconductor Nanocomposites
Source abstract
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 CsPbBr3 into Cs4PbBr6 in the presence of PbS at 450 °C to produce doped nanocrystal-based composites with embedded Cs4PbBr6 nanoprecipitates. We show that PbBr2 is extracted from CsPbBr3 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 1019 and 1020 cm-3, and it may serve as a general strategy for doping other nanocrystal-based semiconductors.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Thermal Expansion and Ionic Conductivity
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Science and Technology Austria, Klosterneuburg 3400, Austria
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona 08193, Catalonia, Spain
Materials Science and Engineering Department, Izmir Institute of Technology, İzmir, Turkey
Department of Chemistry and Applied Biosciences, ETH Zürich, Zurich CH-8093, Switzerland
Empa-Swiss Federal Laboratories for Materials Science and Technology, Zurich CH-8600, Switzerland
ICREA, Pg. Lluís Companys 23, Barcelona 08010, Catalonia, Spain
Funding
FP7 People: Marie-Curie Actions · European Commission · Departament d'Innovaci?, Universitats i Empresa, Generalitat de Catalunya · Ministerio de Ciencia e Innovaci?n · H2020 European Research Council
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