Journal of Metals, Materials and Minerals
Publication Date
2026
Abstract
Gd2MoO6:Eu3+ phosphor-in-glass (PIG) composites were synthesized by a microwave-assisted melting technique using a 50SiO2:20TeO2:15Na2O:15BaO glass matrix containing 0.00 wt% to 10.00 wt% phosphor. Their structural, optical, and luminescent properties were systematically investigated. X-ray diffraction confirmed the formation of crystalline Gd2MoO6 phases, which became prominent at 5.00 wt% and 10.00 wt%, indicating partial crystallization within the glass network. The density and refractive index increased from 3.621 g∙cm‒3 to 3.774 g∙cm‒3 and 1.535 to 1.692 with higher phosphor loading, suggesting a more compact structure. Absorption spectra showed four characteristic Eu3+ bands at 464 nm, 534 nm, 2088 nm, and 2203 nm, while excitation monitored at 613 nm exhibited the strongest band at 394 nm (7F0→5L6). Emission spectra revealed intense red emissions at 590 nm, 613 nm, 653 nm, and 702 nm, corresponding to the 5D0→7F1–7F5 transitions, with chromaticity coordinates of (x, y) = (0.65, 0.34). The photoluminescence lifetime, measured under 394 nm excitation and monitored at 613 nm emission, decreased slightly from 1.719 ms to 1.585 ms. Vickers hardness values measured under a 0.2 kgf load ranged from 1601.7 HV0.2 to 1606.1 HV0.2, indicating high mechanical durability. Overall, the obtained PIG composites show strong red emission and robust structural properties, demonstrating their potential for solid-state lighting applications.
DOI
10.55713/jmmm.v36i3.2595
First Page
1
Last Page
7
Recommended Citation
Yasaka, Patarawagee; Wongwan, Winut; Khondara, Seubsakun; and Kaewkhao, Jakrapong
(2026)
"Enhanced red emission of Gd2MoO6:Eu phosphor-in-glass embedded in SiO2-TeO2-Na2O-BaO matrix for solid-state lighting,"
Journal of Metals, Materials and Minerals: Vol. 36:
No.
3, Article 13.
DOI: 10.55713/jmmm.v36i3.2595
Available at:
https://digital.car.chula.ac.th/jmmm/vol36/iss3/13