Effects of Heat Treatment and Yb 3+ Concentration on the Downconversion Emission of Er 3+ /Yb 3+ Co-Doped Transparent Silicate Glass-Ceramics
| Autor: | Tran Duy Tap, Hieu T. Nguyen-Truong, Jianbei Qiu, Ho Kim Dan, Nguyen Minh Ty, Dacheng Zhou |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Er3+/Yb3+ heat treatment Mechanical Engineering BaF2 Condensed Matter Physics Downconversion Chemical engineering Mechanics of Materials visual_art glass-ceramics visual_art.visual_art_medium TA401-492 General Materials Science Ceramic Silicate glass Materials of engineering and construction. Mechanics of materials Co doped |
| Zdroj: | Materials Research v.22 n.5 2019 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL Materials Research, Vol 22, Iss 5 (2019) |
| Popis: | The SiO2-Al2O3-BaF2-TiO2-CaF2 transparent silicate glass-ceramics containing BaF2 nanocrystals were successfully prepared by heat treatment process through conventional melting method. Effects of heat treatment processes and Yb3+ concentration on the downconversion (DC) emission of the co-doped Er3+/Yb3+ transparent silicate glass-ceramics were investigated. With the increase of temperatures and times of heat treatment process, the DC emission intensity of the co-doped Er3+/Yb3+ glass-ceramics was significantly enhanced. At the same time, with the increase of Yb3+ concentration, the value of DC intensity of Er3+/Yb3+ co-doped bands centered at 849, 883 and 1533 nm is maximized when the concentration of Yb3+ reaches 2.5 mol.%. When the concentration exceed 2.5 mol. %, the DC emission intensity of Er3+/Yb3+ co-doped bands centered at 849, 883 and 1533 nm was decreased, owing to the self-quenching effect. It’s interesting that the DC emission intensity of Er3+/Yb3+ co-doped band centered at 978 nm didn’t quench when the Yb3+ concentration exceed 2.5 mol. %. At the same time, the DC mechanism and ET processes between Yb3+ and Er3+ ions were discussed. |
| Databáze: | OpenAIRE |
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