Co-Doping Effect of Mn2+ and Eu3+ on Luminescence in Strontiowhitlockite Phosphors

被引：7
作者：
Nikiforov, Ivan V. [1 ]
Spassky, Dmitry A. [2 ,3 ]
Krutyak, Nataliya R. [2 ,3 ]
Shendrik, Roman Yu. [4 ]
Zhukovskaya, Evgenia S. [1 ]
Aksenov, Sergey M. [5 ,6 ]
Deyneko, Dina V. [1 ,5 ]
机构：
[1] Lomonosov Moscow State Univ, Dept Chem, Moscow 119991, Russia
[2] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia
[3] Univ Tartu, Inst Phys, EE-50411 Tartu, Estonia
[4] Russian Acad Sci, Vinogradov Inst Geochem, Siberian Branch, Irkutsk 664033, Russia
[5] Russian Acad Sci, Kola Sci Ctr, Lab Arctic Mineral & Mat Sci, Apatity 184209, Russia
[6] Russian Acad Sci, Kola Sci Ctr, Geol Inst, Apatity 184209, Russia
来源：
MOLECULES | 2024年 / 29卷 / 01期
基金：
俄罗斯科学基金会;
关键词：
beta-Ca-3(PO4)(2); beta-TCP; strontiowhitlockite; phosphors; phosphate; Mn2+/Eu3+; luminescence; LED; RED EMITTING PHOSPHOR; ENERGY-TRANSFER; THERMAL-STABILITY; SITE-OCCUPANCY; SOLID-SOLUTION; PHOTOLUMINESCENCE; EMISSION; EU2+; REDUCTION; AIR;
D O I：
10.3390/molecules29010124
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
A new series of Sr-based phosphates, Sr9-xMnxEu(PO4)(7), were synthesized using the high-temperature solid-state method in air. It was found that these compounds have the same structure as strontiowhitlockite, which is a beta-Ca-3(PO4)(2) (or beta-TCP) structure. The concentration of Mn2+ ions required to form a pure strontiowhitlockite phase was determined. An unusual partial reduction of Eu3+ to Eu2+ in air was observed and confirmed by photoluminescence (PL) and electron spin resonance (ESR) spectra measurements. The PL spectra recorded under 370 nm excitation showed transitions of both 4f5d-4f Eu2+ and 4f-4f Eu3+. The total integral intensity of the PL spectra, monitored at 395 nm, decreased with increasing Mn2+ concentration due to quenching effect of Eu3+ by the Mn2+ levels. The temperature dependence of Eu2+ photoluminescence in a Sr9-xMnxEu(PO4)(7) host was investigated. The conditions for the reduction of Eu3+ to Eu2+ in air were discussed.
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页数：17
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