Low temperature synthesis and enhancement of blue emitting CaMgSi2O6: Eu2+ phosphor by co-doping

被引：1
|
作者：
Sivakumar, V. [1 ]
Lakshmanan, Arunachalam [2 ]
Sangeetha, L. [2 ]
Saravanakumar, S. [3 ]
机构：
[1] M Kumarasamy Coll Engn, Dept Phys, Karur 639113, India
[2] Saveetha Engn Coll, Dept Phys, Chennai 602105, India
[3] Kalasalingam Acad Res & Educ, Dept Phys, Krishnan Koil 626126, India
来源：
DISPLAYS | 2023年 / 80卷
关键词：
Blue phosphors; Thermal quenching; nUV LED; Co-dopant; CaMgSi2O6: Eu2+; LUMINESCENT PROPERTIES; PYROLYSIS;
D O I：
10.1016/j.displa.2023.102524
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
Near UV excitable blue emitting Eu2+ activated CaMgSi2O6 phosphor has been synthesized by urea assisted pyrolysis technique. The effects of flux (H3BO3, NH4F, NH4Br, NH4Cl, CaF2, BaF2), sintering temperature (700-1100 C-degrees), activator concentrations and co-dopants (Zn2+, Y3+, Al3+ and Gd3+) on the photoluminescence properties of CaMgSi2O6: Eu2+ were studied systematically. Zn2+, Y3+, Al3+ and Gd3+ co-doped CaMgSi2O6: Eu2+ phosphors improved the PL intensity and also exhibited a wide excitation band in the region of 250-420 nm, and emission at 447 nm found suitable for nUV based white LED applications. The PL emission intensity of Y3+ codoped CaMgSi2O6: Eu2+ is comparable to that of the commercial BaMgA(l1)O(17):Eu2+ blue emitting phosphor. However, Y3+ co-doped CaMgSi2O6: Eu2+ showed a higher thermal quenching when compared with BaMgA(l1)O(17): Eu2+. The crystalline phase formation and morphology of synthesized silicate phosphors were confirmed by powder XRD and SEM analysis.
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页数：7
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