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Structural and Optical Properties of Eu3+-Doped Sr3Y2Ge3O12 as an Efficient Red Phosphor for WLED Application
Abstract
This paper is aimed at investigating the structure and luminescence properties of Sr3Y2Ge3O12 activated by Eu3+ (SYGO:Eu3+), which were synthesized by using the sol-gel method. The synthesis was conducted at 1200°C for 8 h, with an optimal doping concentration of 5 mol% Eu3+. Under near-ultraviolet excitations at 395 nm, SYGO:x mol.% Eu3+ phosphors showed the red emission of Eu3+ (5D0–7F1) at 612 nm, and the photoluminescence intensity was highest at 5 mol.% Eu3+ doping. X-ray diffraction analysis of SYGO materials displays a single-phase structure that belongs to the Ia3d (230) space group. The result showed that the Eu3+ ion substitutes the asymmetrical location in the SYGO host, particularly the Sr2+ position, by calculating the ionic radius. In addition, the investigated red phosphors show high luminescence intensity and deep red emission. Thus, they show application potential as red-emitting phosphor materials in white LEDs under near-ultraviolet excitations.
About the Authors
C. X. Thang
School of Materials Science Engineering (SMSE), Hanoi University of Science and Technology (HUST)
Viet Nam
Viet Nam
Hanoi
N. M. C. H. P. Lan
School of Materials Science Engineering (SMSE), Hanoi University of Science and Technology (HUST)
Viet Nam
Viet Nam
Hanoi
P. V. Tuan
School of Materials Science Engineering (SMSE), Hanoi University of Science and Technology (HUST)
Viet Nam
Viet Nam
Hanoi
N. T. Giang
Faculty of Materials, Hanoi University of Civil Engineering
Viet Nam
Viet Nam
Hanoi
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Review
For citations:
Thang C., Lan N., Tuan P., Giang N. Structural and Optical Properties of Eu3+-Doped Sr3Y2Ge3O12 as an Efficient Red Phosphor for WLED Application. Zhurnal Prikladnoii Spektroskopii. 2024;91(2):319. (In Russ.)
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