Journal of Alloys and Compounds· 2026Q1
Sm2O3 effect on structural, optical and isothermal properties of borophosphate glasses for solid-state lighting applications
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- Q1SCImago
- 2026year
Short summary
Adding samarium oxide (Sm2O3) to borophosphate glasses shifts their emission towards white light (CIE coordinates of x=1.5 glass are 0.38, 0.24) and reduces decay lifetime from 4.72 to 1.01 ms, making them promising for solid-state lighting.
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Key points
- Sm2O3 addition increases bridging oxygens and band gap (3.79 to 3.96 eV) in borophosphate glasses.
- Emission shifts towards blue-pink and pure blue regions with Sm2O3, with x=1.5 glass achieving CIE coordinates (0.38, 0.24).
- Decay lifetime decreases from 4.72 to 1.01 ms as Sm2O3 concentration rises.
- Conversion to glass-ceramics further refines emission towards pure blue (CIE 0.16, 0.07).
AI-generated from the title and abstract; the full text is not read.
Abstract
The effect of Sm 2 O 3 on the structural, thermal, and optical properties 55 P 2 O 5 − 15 B 2 O 3 − 10 Na 2 O − ( 20 − x ) Li 2 O − ( x ) Sm 2 O 3 (x = 0.0, 0.5, 1.0, and 1.5 mol%) of glass and glass-ceramics are investigated. Sm 2 O 3 enhanced the creation of bridging oxygens by converting the phosphate units from P 0 ⟶ P n where n = 1, 2, and 3, along with a non-linear trend in the oxygen packing density and molar volume. The band gap increases from 3.79 to 3.96 eV as Sm 2 O 3 increases in as-prepared glasses. The emission spectra are in the blue-pink region for glasses and shift towards the pure blue region in glass-ceramics, particularly due to the evolution of Na 2 B 6 O 10 phase. The decay lifetime of glasses is decreased from 4.72 to 1.01 ms with Sm 2 O 3 concentration. The CIE (x, y) coordinates of x=1.5 glass are (0.38, 0.24), which is a closer approximation to pure white light coordinates (0.33, 0.33) emission, while in glass-ceramics, CIE coordinates are (0.16, 0.07). The conversion of glass into glass-ceramics provides a better, variable, and sample-based approach to functionalizing these materials for solid-state lighting applications.
The authors' abstract, as published at the source. Journal of Alloys and Compounds, 2026 · DOI ↗
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Field: Ceramics and Composites
Ceramics and CompositesMaterials Science