Stannum-(II) dopant effects on morphology evolution and upconversion performance of Yb3+/Er3+:NaGdF4 crystals |
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| Affiliation: | 1. Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin 150001, China;2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;3. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China;4. Fiber Optical Sensing Center for Excellence, Yantai Research Institute & Graduate School, Harbin Engineering University, Yantai 264000, China |
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| Abstract: | Hexagonal Yb3+/Er3+:NaGdF4 nanocrystals codoped with Sn2+ ions were prepared via a modulated solvothermal method. Upon introducing 25mol% Sn2+ ions into the host lattice by substituting Gd3+ ions, a portion of Yb3+/Er3+:NaGdF4 nanocrystals was converted into nanorods. Meanwhile, the upconversion (UC) luminescence intensity of 542 nm and 652 nm were intensified by 24 and 33 times respectively, when compared with samples without Sn2+ ions doping. The effect of Sn2+ ions doping content on the morphology and UC emission performances of Yb3+/Er3+:NaGdF4 nanocrystals were discussed in detail. The enhancement of UC luminescence intensity could be attributed to the growth of UC nanocrystals and the low crystal local symmetry around Yb3+/Er3+ ion pairs. This study may be beneficial for fabricating high-performance UC materials and realizing their practical applications. |
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| Keywords: | Morphology UC performance |
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