Photoluminescence and structural analysis of Er3+/Yb3+/Tm3+ triply doped Gd2O3

Leonardo Alves Rocha, Edison Pecoraro, Sidney José Lima Ribeiro, Wagner de Souza Machado, Marco Antônio Schiavon, Jefferson Luis Ferrari, Lorena Pereira Baeta Durante, Danilo Manzani, Patrícia Benedini Martelli

Resumo


Spectroscopic and structural properties of Er3+:Yb3+:Tm3+ triply doped Gd2O3 nanocrystals were investigated. Materiais were heat treated at 800, 900, 1000 and 1100 ºC for 4h, and heat treatment effect in the luminescence was discussed. The doping process with RE3+ was effective on Gd2O3 cubic phase, and structural parameters were determined for this phase. The morphology of the particles did not showed difference on shape and size, demonstrating the reproducibility of the synthesis methods. The luminescence at visible and infrared regions was studied when samples are excited at 980 nm. Materials present intense visible up-conversion and infrared emissions at 1550 nm, and Er3+ emissions are favored in the materials, concluding that in Er3+:Yb3+:Tm3+ triply doped materials the transfer between Yb3+ and Er3+ occurs preferentially. Materials due absorption at UV and IR regions can be availed in solar concentrators, as well as 1550nm for optical telecom applications in the C-band.


Palavras-chave


Terras raras, Espectroscopia, fotoluminescência, Química de Materiais



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