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- Title
Composition-tuned photoluminescence spectra of colloidal CdSe<sub>x</sub>S<sub>1−x</sub> ternary nanoalloys.
- Authors
Nguyen, Minh Hoa; Dinh, Thanh Binh; Le, Anh Thi; Le, Duy Manh; Phḁm, Thanh Dam; Do, T. Anh Thu; Hoang, Manh Ha; Man, Minh Tan
- Abstract
The colloidal CdSexS1−x ternary nanoalloys were prepared by fine-tuning the chemical composition using phosphine-free solvents. With an increase in Se content, the bandgaps may be changed from 2.81 to 1.95 eV. The influence of lattice strain on the carrier dynamics of CdSexS1−x nanoalloys has been investigated. The structural investigation of the nanoalloys reveals a linear expansion of the Zinc cubic lattice with increasing S content, demonstrating that the lattice strain was caused by the difference between Cd–S and Cd–Se bond lengths. Photoluminescence decay time of CdSexS1−x nanoalloys decreased with increasing lattice constant, indicating that lattice strain affects both radiative and nonradiative relaxation rates.
- Subjects
PHOTOLUMINESCENCE; LATTICE constants; CHEMICAL bond lengths
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 14, p11414
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08114-y