TY - JOUR
T1 - Effects of GeO2 on the thermal stability and optical properties of Er3+/Yb3+-codoped oxyfluoride tellurite glasses
AU - Zhang, Yan
AU - Lu, Chunhua
AU - Feng, Yijun
AU - Sun, Liyan
AU - Ni, Yaru
AU - Xu, Zhongzi
PY - 2011/4/15
Y1 - 2011/4/15
N2 - The aim of this article was to study the influence of GeO2 on the thermal stability and optical properties of Er3+/Yb3+ codoped (70 - x)TeO2-xGeO2-PbF2-BaF2 (TGEYx) glasses prepared by using a melting method. The properties of Er 3+/Yb3+ codoped glasses were investigated by using differential scanning calorimetry, upconversion luminescence, Raman and optical absorption spectra. The results indicated that TGEY35 glass with the germanate-tellurite mixed network showed the best thermal stability and poor crystallization tendency. With increasing the GeO2 content, the maximum phonon energy of oxyfluoride tellurite glass network increased, while the phonon density decreased. The upconversion emission intensities enhanced obviously based on the decreasing phonon density of glass hosts, while the increasing red emission (657 nm) with the increase of GeO2 concentration was attributed to the relative larger maximum phonon energy which matching the energy gap between the pertinent 4S3/2 and 4F9/2 levels.
AB - The aim of this article was to study the influence of GeO2 on the thermal stability and optical properties of Er3+/Yb3+ codoped (70 - x)TeO2-xGeO2-PbF2-BaF2 (TGEYx) glasses prepared by using a melting method. The properties of Er 3+/Yb3+ codoped glasses were investigated by using differential scanning calorimetry, upconversion luminescence, Raman and optical absorption spectra. The results indicated that TGEY35 glass with the germanate-tellurite mixed network showed the best thermal stability and poor crystallization tendency. With increasing the GeO2 content, the maximum phonon energy of oxyfluoride tellurite glass network increased, while the phonon density decreased. The upconversion emission intensities enhanced obviously based on the decreasing phonon density of glass hosts, while the increasing red emission (657 nm) with the increase of GeO2 concentration was attributed to the relative larger maximum phonon energy which matching the energy gap between the pertinent 4S3/2 and 4F9/2 levels.
KW - A. Glasses
KW - C. Differential scanning calorimetry
KW - C. Raman spectroscopy and scattering
KW - D. Luminescence
UR - http://www.scopus.com/inward/record.url?scp=79951674947&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2010.12.043
DO - 10.1016/j.matchemphys.2010.12.043
M3 - 文章
AN - SCOPUS:79951674947
SN - 0254-0584
VL - 126
SP - 786
EP - 790
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 3
ER -