Luminescence of Ce-doped aluminophosphate glasses

• Published in: Journal of materials science. Materials in electronics Vol. 30; no. 18; pp. 16774 - 16780
• Main Authors: Kielty, M. W., Pan, L., Dettmann, M. A., Herrig, V., Akgun, U., Jacobsohn, L. G.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-09-2019; Springer Nature B.V
• Subjects: Aluminum oxide; Aluminum phosphate; Barium oxides; Cerium; Characterization and Evaluation of Materials; Chemical composition; Chemistry and Materials Science; Cut off wavelength; Density; Excitation; Fluorescence; Glass; Luminescence; Materials Science; Optical and Electronic Materials; Optical properties; Organic chemistry; Phosphorus pentoxide; Photoluminescence; Radiation; Raman spectra; Refractivity; Silicon dioxide; Spectrum analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-019-01301-4

The effects of BaO network modifier on the structure, optical properties and luminescence of Ce-doped aluminophosphate glasses were investigated. Glasses were prepared by the melt quenching method in air with different chemical compositions: 50 or 60 mol% P
2
O
5
 + 5, 15 or 25 mol% SiO
2
 + 4–19 mol% BaO + 15 mol% Al
2
O
3
 + 1–6 mol% Ce
2
O
3
such the total summed up to 100 mol%. Density was determined to be within 2.7–3.0 g/cm
3
, while the index of refraction was estimated using the Gladstone-Dale relation using the experimentally-obtained density values to be around 1.48. For each glass series, Raman spectra varied according to the BaO and/or Ce
2
O
3
content. For 1 mol% Ce-doped glasses, the ultraviolet (UV) transparency cutoff was within 317–328 nm, with the cutoff wavelength increasing to 367–373 nm for 6 mol% doped glasses. Scintillation was characterized by radioluminescence (RL) measurements under X-ray excitation, and luminescence by photoluminescence emission (PL), excitation, and fluorescence lifetime measurements. PL and RL results showed a broad band centered around 3.3–3.6 eV with a fluorescence lifetime of about 30 ns. The highest RL output was observed from the 60P
2
O
5
·14BaO·5SiO
2
·15Al
2
O
3
·6Ce
2
O
3
glass.