Eu3+ singly-doped and Eu3+/Sm3+ co-doped ZnS quantum dots: structure, optical properties and energy transfer.
| Title: | Eu3+ singly-doped and Eu3+/Sm3+ co-doped ZnS quantum dots: structure, optical properties and energy transfer. |
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| Authors: | Thuy NTM; Faculty of Physics, TNU - University of Education, Thai Nguyen, Vietnam.; Huong TTT; Institute of Science and Technology, TNU - University of Sciences, Thai Nguyen, Vietnam. canx@tnus.edu.vn.; Department of Science and Technology, Ha Noi University of Industry, Ha Noi, Vietnam.; Hien NT; Institute of Science and Technology, TNU - University of Sciences, Thai Nguyen, Vietnam. canx@tnus.edu.vn.; Luyen NT; Institute of Science and Technology, TNU - University of Sciences, Thai Nguyen, Vietnam. canx@tnus.edu.vn.; Kien NT; Institute of Science and Technology, TNU - University of Sciences, Thai Nguyen, Vietnam. canx@tnus.edu.vn.; Van NTK; Institute of Science and Technology, TNU - University of Sciences, Thai Nguyen, Vietnam. canx@tnus.edu.vn.; Tan PM; Faculty of Fundamental and Applied Sciences, TNU - University of Technology, Thai Nguyen, Vietnam.; Vinh ND; Faculty of Chemistry, TNU - University of Sciences, Thai Nguyen, Vietnam.; Ngoc T; Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam.; Faculty of Environmental and Natural Sciences, Duy Tan University, Da Nang, 550000, Vietnam.; Ca NX; Institute of Science and Technology, TNU - University of Sciences, Thai Nguyen, Vietnam. canx@tnus.edu.vn. |
| Source: | Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2024 Oct 09; Vol. 26 (39), pp. 25488-25500. Date of Electronic Publication: 2024 Oct 09. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 100888160 Publication Model: Electronic Cited Medium: Internet ISSN: 1463-9084 (Electronic) Linking ISSN: 14639076 NLM ISO Abbreviation: Phys Chem Chem Phys Subsets: MEDLINE; PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Cambridge [England] : Royal Society of Chemistry, c1999- |
| Abstract: | In this study, Eu3+ ion singly doped and Eu3+/Sm3+ ions co-doped ZnS semiconductor quantum dots (QDs) were successfully synthesized using a wet chemical method in 1-octadecene (ODE) solvent. The successful doping of Sm3+ and Eu3+ ions into the ZnS host lattice and the composition and valence of the elements present in the sample were confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Structural and morphological studies revealed the presence of Eu3+-doped ZnS and Eu3+/Sm3+ co-doped ZnS QDs of about 3-4 nm size with a zinc blende structure. The Judd-Ofelt (J-O) intensity parameters of Eu3+-doped ZnS QDs were determined from their fluorescence spectra. The optical properties of Eu3+/Sm3+ co-doped ZnS QDs were studied by changing the Eu3+ ion concentration and fixing the Sm3+ ion concentration. The photoluminescence (PL) spectra of Eu3+/Sm3+ co-doped ZnS QDs were obtained at an excitation wavelength of 403 nm (6H5/2 → 6P3/2 transition of Sm3+ ions) in the 525-725 nm range. The effective energy transfer (ET) process from Sm3+ to Eu3+ ions was confirmed and explained in detail using the Reisfeld approximation and the Inokuti-Hirayama model. The CIE color coordinates of the Eu3+/Sm3+ co-doped ZnS QDs were obtained using PL spectral data. Eu3+/Sm3+ co-doped ZnS QDs exhibited a long lifetime and emitted warm red light. These interesting properties give Eu3+/Sm3+ co-doped ZnS QDs great potential for applications in photovoltaics, photocatalysis, and biomarkers. |
| Entry Date(s): | Date Created: 20240926 Latest Revision: 20241009 |
| Update Code: | 20260130 |
| DOI: | 10.1039/d4cp03182b |
| PMID: | 39324950 |
| Database: | MEDLINE |
Journal Article