Bright yellow-emitting long persistent luminescence from Mn2+-activated strontium aluminate phosphor
| Autor: | Jize Cai, Wenzhi Sun, Hongwu Zhang, Tao Tan |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Duration time
Doping Analytical chemistry Strontium aluminate Phosphor 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Spectral line 0104 chemical sciences Ion chemistry.chemical_compound Persistent luminescence chemistry Geochemistry and Petrology 0210 nano-technology Excitation |
| Zdroj: | Journal of Rare Earths. 40:1029-1036 |
| ISSN: | 1002-0721 |
| DOI: | 10.1016/j.jre.2021.05.006 |
| Popis: | We developed bright yellow-emitting long persistent luminescence (LPL) materials Sr4Al14O25:Mn2+ and Sr4Al14O25:Mn2+,N (N = Zr4+, Ho3+, Er3+) by high temperature solid-state reaction. The addition of Zr4+, Ho3+ and Er3+ can regulate trap distributions and improve energy storage ability of the materials. The LPL performance of SAO:Mn2+,Ho3+ is optimal, considering LPL intensity and duration time. Bright LPL of SAO:Mn2+,Ho3+ can be observed for 3 h by naked eyes in dark after removing the excitation source. Profiles of LPL spectra are different from those of PL, because the two types of Mn2+ centers do not play equal parts in LPL and PL. Trap depths of TL peaks centered at 354 K (peak 1) and 455 K (peak 2) are 0.60 and 0.72 eV, respectively. And peak 1 at 354 K is the effective TL peak responsible for LPL. In SAO:Mn2+,Ho3+, Mn2+ ions doped in Al3+ sites serve as emitting centers, and positively charged Ho Sr · defects are the main effective trap centers. Finally, a feasible LPL mechanism of SAO:Mn2+,Ho3+ was proposed to clarify the generation process of LPL. |
| Databáze: | OpenAIRE |
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