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Lead-free cesium tin halide nanocrystals for light-emitting diodes and color down conversion.
- Source :
-
RSC advances [RSC Adv] 2020 Oct 07; Vol. 10 (61), pp. 37161-37167. Date of Electronic Publication: 2020 Oct 07 (Print Publication: 2020). - Publication Year :
- 2020
-
Abstract
- Organometal halide perovskites are attracting a great deal of attention because of their long carrier diffusion lengths, wide wavelength tunability, and narrow-band emission. However, the toxicity of lead has caused considerable environmental and health concerns. In this work, lead-free cesium tin halide nanocrystals are synthesized and investigated. CsSnBr <subscript>3</subscript> and CsSnI <subscript>3</subscript> nanocrystals, 25 and 7 nm in size, are synthesized by a facile hot injection method. Absorption spectroscopy, photoluminescence spectroscopy, and X-ray diffraction were used to understand their structural and optical properties. CsSnBr <subscript>3</subscript> and CsSnI <subscript>3</subscript> nanocrystals show emission peaks at 683 and 938 nm, respectively. These nanocrystals show shelf stability for a few months. Temperature-dependent photoluminescence is utilized to know more about fundamental physical parameters, such as exciton binding energy, charge carrier-phonon interactions and band gap. Light-emitting diodes and color down-conversion films are also demonstrated using these lead free perovskite nanocrystals.<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)
Details
- Language :
- English
- ISSN :
- 2046-2069
- Volume :
- 10
- Issue :
- 61
- Database :
- MEDLINE
- Journal :
- RSC advances
- Publication Type :
- Academic Journal
- Accession number :
- 35521228
- Full Text :
- https://doi.org/10.1039/d0ra06139e