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  • State-selective energy transfer from Er3+ to Eu3+ in Bi2O3-GeO2-Ga2O3-Na2O glasses.

State-selective energy transfer from Er3+ to Eu3+ in Bi2O3-GeO2-Ga2O3-Na2O glasses.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (2008-11-18)
Jun Wang, Yaxun Zhou, Shixun Dai, Tiefeng Xu, Qiuhua Nie
ABSTRACT

The Eu(3+) ion was introduced into Er(3+) doped Bi(2)O(3)-GeO(2)-Ga(2)O(3)-Na(2)O (BGGN) glasses to improve the 1.5 microm band emission. As a function of Eu(2)O(3) doped content, we observed the increase in non-radiative decay rate of Er(3+) not only (4)I(11/2) energy level but also (4)I(13/2) energy level, while the lifetime of Er(3+):(4)I(11/2) and (4)I(13/2) levels were shortened from 607 to 241 micros and from 3.37 to 1.88 ms, respectively. Accordingly, the upconversion fluorescence (green and red) was quenched. The total quantum efficiency of the Er(3+):(4)I(13/2) increased with the Eu(2)O(3) content increasing up to 0.2 mol% due to the state-selective energy transfer from Er(3+) to Eu(3+).

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Germanium(IV) oxide, powder, 99.999% trace metals basis
Sigma-Aldrich
Germanium(IV) oxide, ≥99.99% trace metals basis
Sigma-Aldrich
Germanium(IV) oxide, (crystalline powder), 99.998% trace metals basis
Sigma-Aldrich
Sodium oxide, 80%