| Autor: |
Han, Xiangyu, Xin, Chengrui, Wang, Shuxian, Wu, Jiaming, Ye, Zhengmao, Yu, Haohai, Zhang, Huaijin |
| Zdroj: |
Inorganic Chemistry; June 2023, Vol. 62 Issue: 24 p9679-9686, 8p |
| Abstrakt: |
Adjusting the local coordination environment of lanthanide luminescent ions can modulate their crystal-field splittings and broaden their applications in the relevant optical fields. Here, we introduced Eu3+ions into the phase-change K3Lu(PO4)2phosphate and found that the temperature-induced reversible phase transitions of K3Lu(PO4)2(phase I ⇆ phase II and phase II ⇆ phase III, below room temperature) give rise to an obvious photoluminescence (PL) difference of Eu3+ions. The Eu3+emission mainly focused on the 5D0→ 7F1transition in phase III but manifested comparable 5D0→ 7F1,2transitions in the two low-temperature phases. On this basis, the change of Eu3+-doped concentration led to the phase evolution in Eu3+:K3Lu(PO4)2, which could stabilize two types of low-temperature polymorphs to the specific temperature by controlling the doping content. Finally, we proposed a feasible information encryption strategy based on the PL modulation of Eu3+:K3Lu(PO4)2phosphors, which was caused by the temperature hysteresis of the relevant phase transition, exhibiting good stability and reproducibility. Our findings pave an avenue for exploring the optical application of lanthanide-based luminescent materials by introducing phase-change hosts. |
| Databáze: |
Supplemental Index |
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