A novel white-light emitting BaBi2Nb2O9: Li+/Tm3+/Er3+/Yb3+ upconversion phosphor
| Autor: | Tasso O. Sales, Marcello X. Façanha, Carlos Jacinto da Silva, Antonio Sergio Bezerra Sombra, João P.C. do Nascimento, Artur S. Gouveia-Neto, Felipe F. do Carmo, W.Q. Santos |
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| Rok vydání: | 2018 |
| Předmět: |
Photoluminescence
Materials science Biophysics Analytical chemistry Phosphor 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics Photon upconversion 0104 chemical sciences Ion Phase (matter) Chromaticity 0210 nano-technology Luminescence Power density |
| Zdroj: | Journal of Luminescence. 204:539-547 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2018.08.016 |
| Popis: | BaBi2Nb2O9:Li+/Tm3+/Er3+/Yb3+ phosphors were successfully synthesized by the high-temperature solid-state method and up-conversion white-light emission has been achieved by tuning of the Tm3+ and Li+ contents. X-ray diffraction and room temperature photoluminescence were used, respectively, to investigate the structural and optical properties of the luminescent systems. Decay dynamics of 4F9/2 levels in BBN:Tm3+/Er3+/Yb3+ and BBN:Er3+/Yb3+ phosphors have been analyzed to study the energy-transfer mechanism between Er3+ and Tm3+ ions. The introduction of Li+ ions into the BBN:0.5%Tm3+0.05%Er3+8%Yb3+ has induced an adjustment of tristimulus values shifting the chromaticity color coordinates of the phosphor towards to the ideal white region (x = 0.31 and y = 0.34). Furthermore, the high color purity white-light coming from the BBN:2%Li+0.5%Tm3+0.05%Er3+8%Yb3+ composition was obtained under moderate power density establishing the BBN phase as a host matrix able to generate RGB with energy saving. |
| Databáze: | OpenAIRE |
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