Direct fabrication of Cd-In-S alloy quantum dots thin films
Abstract
In this article, a new simple one-step process to fabricate Cd-In-S luminescent quantum dot thin films (QDTFs) is provided. Metal sulfide precursor solutions were manufactured by directly adding a certain amount of butylamine and carbon disulfide in the ethanol solution followed by dissolving Cd(OH)2 and In(OH)3 powder. Cd-In-S luminescent QDTFs can be obtained by mixing Cd and In precursor solutions and then spinning on a cover slip and annealing on a hot plate at 190 °C under air atmosphere directly without complicated synthesis method. By changing the sintering parameters including the temperature, time and ratios of (Cd+In)/ligand, the Cd-In-S luminescent QDTFs covering the entire visible light wavelength from 470 to 628 nm can be obtained. The Cd-In-S luminescent QDTFs exhibited remarkable optical properties and has potential application in solar cell and light emitting diode, with the photoluminescence quantum yield of up to 36.5%.
- Publication:
-
Materials Research Express
- Pub Date:
- November 2019
- DOI:
- 10.1088/2053-1591/ab4be5
- Bibcode:
- 2019MRE.....6k5083C
- Keywords:
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- Quantum dots thin films;
- metal sulfide precursor solution approach;
- Cd–In–S