摘要
Tm^3 ＋/Yb^3 ＋-codoped oxychloride tellurite glasses were prepared. Thermal stability, Raman spectra and upconversion luminescence spectra were studied, and upconversion luminescence mechanisms were analyzed. The results show that the intense blue and relatively weak red emissions centered at 476 and 649 nm corresponding to the transitions ^1G4→^3H6 and ^1G4→^3H4 of Tm^3＋ , respectively, were simultaneously observed at room temperature under 980 nm LD excitation. With increasing while PbCl2 content, thermal stability of host glasses increases, phonon energy of host glasses decreases, and upconversion luminescence intensities increase, which indicate that Tm^3＋/ Yb^3＋-codoped oxychloride tellurite glasses can be used as potential host materials for upconversion blue lasers.
Tm^3 ＋/Yb^3 ＋-codoped oxychloride tellurite glasses were prepared. Thermal stability, Raman spectra and upconversion luminescence spectra were studied, and upconversion luminescence mechanisms were analyzed. The results show that the intense blue and relatively weak red emissions centered at 476 and 649 nm corresponding to the transitions ^1G4→^3H6 and ^1G4→^3H4 of Tm^3＋ , respectively, were simultaneously observed at room temperature under 980 nm LD excitation. With increasing while PbCl2 content, thermal stability of host glasses increases, phonon energy of host glasses decreases, and upconversion luminescence intensities increase, which indicate that Tm^3＋/ Yb^3＋-codoped oxychloride tellurite glasses can be used as potential host materials for upconversion blue lasers.
