1. Enhancing emission intensity and thermal stability by charge compensation in Sr2Mg3P4O15:Eu3+.
- Author
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Liu, Shiqi, Liang, Yujun, Zhu, Yingli, Li, Haoran, Chen, Jiahui, Wang, Mengyuan, and Li, Wenjian
- Subjects
STRONTIUM compounds ,THERMAL stability ,EUROPIUM compounds ,PHOSPHORS ,LUMINESCENCE ,METAL ions - Abstract
Abstract: Charge compensation was the effective methods to enhance the luminescence properties of phosphors. In this paper, novel single‐phased orange light emitting Sr
2 Mg3 P4 O15 :Eu3+ phosphors were prepared by solid state method. The phase purity and luminous characteristics were examined in detail. Meanwhile, three kinds of charge compensation methods (co‐doping the alkali metal R+ (R+ = Li, Na, and K), substituting Si4+ for P5+ and self‐compensation) were employed to solve the charge imbalance problem between Sr2+ and Eu3+ . The results showed that emission intensity of Eu3+ was improved by 1.43 (Li+ ), 1.58 (Na+ ), 1.53 (K+ ), 1.61 (Si4+ ), and 1.30 (self) times than that of Sr1.6 Mg3 P4 O15 :0.40Eu3+ , respectively, and there was no change in the emitting color simultaneously. Furthermore, as the temperature reached at 423 K, the emission intensity increased from 41.67% of Sr1.6 Mg3 P4 O15 :0.40Eu3+ to 55.69% (Li+ ), 61.62% (Na+ ), 58.98% (K+ ), 71.15% (Si4+ ), and 80.59% (self) of that at room temperature. The reasons of those phenomena were the reduction in ion vacancies caused by charge imbalance through the charge compensation process. The specific mechanisms were elaborated in detail. Overall, this research validated that the charge compensation strategies could be severed as the key method to improve the luminescence properties, especially the thermal stability of phosphor. [ABSTRACT FROM AUTHOR]- Published
- 2018
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