Er3+/Yb3+ co-doped ZnS quantum dots: structure, optical properties and up-conversion luminescence.
| Title: | Er3+/Yb3+ co-doped ZnS quantum dots: structure, optical properties and up-conversion luminescence. |
|---|---|
| Authors: | Ngan LTT; Faculty of Engineering and Technology, Thai Nguyen University of Information and Communication Technology Thai Nguyen Vietnam.; Yen VH; Faculty of Engineering and Technology, Thai Nguyen University of Information and Communication Technology Thai Nguyen Vietnam.; Hien 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.; Ha NV; 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.; Vinh ND; Faculty of Natural Sciences and Technology, TNU - University of Sciences Thai Nguyen Vietnam.; Ca NX; Institute of Science and Technology, TNU - University of Sciences Thai Nguyen Vietnam canx@tnus.edu.vn. |
| Source: | RSC advances [RSC Adv] 2026 Mar 05; Vol. 16 (14), pp. 12579-12589. Date of Electronic Publication: 2026 Mar 05 (Print Publication: 2026). |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 101581657 Publication Model: eCollection Cited Medium: Internet ISSN: 2046-2069 (Electronic) Linking ISSN: 20462069 NLM ISO Abbreviation: RSC Adv Subsets: PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Cambridge [England] : Royal Society of Chemistry, [2011]- |
| Abstract: | Er3+/Yb3+ co-doped ZnS quantum dots (QDs) were synthesized using a wet chemical approach and studied for their structural and optical properties, as well as upconversion (UC) luminescence. X-ray diffraction (XRD) confirmed the formation of phase cubic ZnS, where rare-earth Er3+ and Yb3+ ions were effectively incorporated into the host lattice without secondary phases. X-ray photoelectron spectroscopy (XPS) analyses further verified the trivalent states of Er and Yb ions in the QDs. For the first time, the UC luminescence phenomenon in Er3+/Yb3+ co-doped ZnS QDs was studied and explained in detail. Under 980 nm excitation, the Er3+/Yb3+ co-doped ZnS QDs exhibited green and red UC bands, dominated by the green emission, whose intensity strongly depended on Yb3+ concentration. Power-dependent and lifetime measurements indicated that the UC process was primarily governed by a two-photon mechanism facilitated by efficient Yb3+ → Er3+ energy transfer. Chromaticity analyses demonstrated a distinct emission color shift from deep-blue (pure ZnS QDs) to stable green-yellow in co-doped QDs. These results highlight the potential of Er3+/Yb3+ co-doped ZnS QDs as efficient UC nanomaterials for applications in photonic and optoelectronic devices.; (This journal is © The Royal Society of Chemistry.) |
| Competing Interests: | There are no conflicts to declare. |
| Entry Date(s): | Date Created: 20260309 Date Completed: 20260309 Latest Revision: 20260309 |
| Update Code: | 20260309 |
| PubMed Central ID: | PMC12962312 |
| DOI: | 10.1039/d6ra00395h |
| PMID: | 41799918 |
| Database: | MEDLINE |
Journal Article