Photoluminescence study of Eu3+ doped zinc-tungsten-antimonite glasses for red LED applications

Autor(es)

Roy, Joy Sankar ; Messaddeq, Younes

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 228, p. 4-pg., 2020-12-01.

Resumo

The rare earth ions doped glassy materials have become crucial capstone in solid state lighting due to their topnotch optical properties. In this work, Eu3+ doped zinc-tungsten-antimonite glasses with compositions of (60 - x) Sb2O3 - 15WO(3) - 25ZnO - xEu(2)O(3) (where x is 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0) were prepared by melt quenching technique. The glasses were prepared with the variation of concentration of Eu3+ ions to achieve superior brightness. The emission intensity increases with the increasing concentration of Eu3+ ions. The prepared glasses exhibit strong hypersensitive red emission at 616 nm due to D-5(0) -> F-7(2) transition under 465 nm excitation wavelength. Along with maximum bright red emission of 3 mol % Eu3+ doped glass also demonstrates high degree of excited state lifetime (556 mu s). All these properties strongly validate the bright prospect of these luminescent glasses for utilizing in red LED applications. (AU)

• Processo FAPESP: 19/12212-9 - Fabricação de reator monolítico de fibra óptica para tratamento de efluentes fotocatalíticos
• Beneficiário: Joy Sankar Roy
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 15/22828-6 - Ultrapassando as fronteiras de fibras ópticas: da fotônica até optogenética e monitoramento de meio ambiente
• Beneficiário: Younes Messaddeq
• Modalidade de apoio: Auxílio à Pesquisa - Programa SPEC
• Processo FAPESP: 17/16826-6 - Exploração de multi-material na fabricação de fibras de vidro fotocatalíticos semicondutores para a supressão da poluição
• Beneficiário: Joy Sankar Roy
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado