1. Synthesis and characterization of In1−Ga P@ZnS alloy core-shell type colloidal quantum dots
- Author
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Yo-Han Suh, Jinwhan Joo, Chang-Lyoul Lee, Jongnam Park, Joonwon Bae, and Yonghoon Choi
- Subjects
Potential well ,Materials science ,Photoluminescence ,business.industry ,Band gap ,General Chemical Engineering ,Alloy ,Quantum yield ,02 engineering and technology ,Crystal structure ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Indium gallium phosphide ,chemistry.chemical_compound ,chemistry ,engineering ,Optoelectronics ,0210 nano-technology ,business ,Visible spectrum - Abstract
We report synthesis of colloidal quantum dots (CQDs), indium gallium phosphide with zinc sulphide shell (In1−xGaxP@ZnS) by a hot injection method and investigate effects of In/Ga ratio on the optical properties of the obtained CQDs. The bandgap of CQDs (1.34–3.54 eV) is controlled by the In/Ga ratio without the quantum confinement effect. The photoluminescence (PL) quantum yield is also dependent on the In/Ga ratio, and temperature dependent PL results show that the randomness of crystal lattice is the most influential parameter. These results show that the In1−xGaxP alloy CQDs can be useful for absorbing the whole range of visible light. In addition, this article can provide background knowledge regarding effect of core metal composition on the optical properties of produced CQDs.
- Published
- 2020