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Enhancing emission intensity and thermal stability by charge compensation in Sr 2 Mg 3 P 4 O 15 :Eu 3+
Author(s) -
Liu Shiqi,
Liang Yujun,
Zhu Yingli,
Li Haoran,
Chen Jiahui,
Wang Mengyuan,
Li Wenjian
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15334
Subject(s) - phosphor , luminescence , analytical chemistry (journal) , thermal stability , emission intensity , ion , materials science , alkali metal , doping , charge (physics) , chemistry , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics
Charge compensation was the effective methods to enhance the luminescence properties of phosphors. In this paper, novel single‐phased orange light emitting Sr 2 Mg 3 P 4 O 15 :Eu 3+ 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 Si 4+ for P 5+ and self‐compensation) were employed to solve the charge imbalance problem between Sr 2+ and Eu 3+ . The results showed that emission intensity of Eu 3+ was improved by 1.43 (Li + ), 1.58 (Na + ), 1.53 (K + ), 1.61 (Si 4+ ), and 1.30 (self) times than that of Sr 1.6 Mg 3 P 4 O 15 :0.40Eu 3+ , 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 Sr 1.6 Mg 3 P 4 O 15 :0.40Eu 3+ to 55.69% (Li + ), 61.62% (Na + ), 58.98% (K + ), 71.15% (Si 4+ ), 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.