TY - JOUR
T1 - Luminescent characteristics of Eu2+/Li+ doped (La-Al)2O3 phosphors and PMMA films activated with them
AU - Mariscal-Becerra, L.
AU - Carmona-Téllez, S.
AU - Alarcón-Flores, G.
AU - Balderas-Aguilar, J. U.
AU - Vázquez-Arreguín, R.
AU - Murrieta, H.
AU - Falcony, C.
N1 - Publisher Copyright:
© 2019, Revista Mexicana de Física.
PY - 2018
Y1 - 2018
N2 - The effect of Li co-doping on the blue luminescence of Eu2+ doped (La-Al)2O3 phosphors and its incorporation into poly (methyl methacrylate) PMMA films are reported. The phosphors were synthesized by a simple two-step process in which the (La-Al)2O3 powders were obtained by an evaporation method, and the subsequent co-doping with Li+ and Eu2+ were made through a solid state reaction in a reductive atmosphere at 1250°C. The incorporation of those phosphors into PMMA matrix and the synthesis of films with thicknesses between 6 and 12 μm was made by drop-casting. The characteristic blue broad band emission centered at 440 nm associated with the 4f65d1 →4F7 transition of Eu2+ ions (CIE coordinates 0.6731, 0.3343) was observed when these powders were excited with 297 nm light. These luminescence intensity was enhanced when Li+ was incorporated as co-dopant up to 320% with respect to those phosphors without Lithium. The luminescent characteristics of these phosphors were preserved when they were embedded into the PMMA films.
AB - The effect of Li co-doping on the blue luminescence of Eu2+ doped (La-Al)2O3 phosphors and its incorporation into poly (methyl methacrylate) PMMA films are reported. The phosphors were synthesized by a simple two-step process in which the (La-Al)2O3 powders were obtained by an evaporation method, and the subsequent co-doping with Li+ and Eu2+ were made through a solid state reaction in a reductive atmosphere at 1250°C. The incorporation of those phosphors into PMMA matrix and the synthesis of films with thicknesses between 6 and 12 μm was made by drop-casting. The characteristic blue broad band emission centered at 440 nm associated with the 4f65d1 →4F7 transition of Eu2+ ions (CIE coordinates 0.6731, 0.3343) was observed when these powders were excited with 297 nm light. These luminescence intensity was enhanced when Li+ was incorporated as co-dopant up to 320% with respect to those phosphors without Lithium. The luminescent characteristics of these phosphors were preserved when they were embedded into the PMMA films.
KW - Eu blue emission
KW - Lithium effect
KW - PMMA composite films
UR - http://www.scopus.com/inward/record.url?scp=85083788159&partnerID=8YFLogxK
U2 - 10.31349/REVMEXFIS.64.447
DO - 10.31349/REVMEXFIS.64.447
M3 - Artículo
AN - SCOPUS:85083788159
SN - 0035-001X
VL - 64
SP - 447
EP - 455
JO - Revista Mexicana de Fisica
JF - Revista Mexicana de Fisica
IS - 5
ER -