Characterization of Nd3+-doped Tellurite Glasses with Low OH Content

High Nd3+→Yb3+ energy transfer efficiency in tungsten‐tellurite glass: A promising converter for solar cells

“…A blue shift of the absorption edge is also observed, indicating that the addition of Yb 3+ caused a change in the glass structural units from TeO 4 (tbp=trigonal bi‐pyramid) to TeO 3 (tp=trigonal pyramid) . Similar changes were reported recently for Nd 3+ added to a TW host, promoting a slight reduction in its phonon energy (~942 cm −1 ) …”

“…23,24 Similar changes were reported recently for Nd 3+ added to a TW host, promoting a slight reduction in its phonon energy (~942 cm À1 ). 25 The infrared emission spectra of the Nd 3+ /Yb 3+ codoped TW glasses were recorded in the range from 850 to 1435 nm under excitation at 514 nm ( Figure 2B). The results show the emission bands of Nd 3+ located at 898 nm ( 4 F 3/2 ?…”

Fluorescence quantum yield of Yb3+-doped tellurite glasses determined by thermal lens spectroscopy

“…2. The WeO À and W]O bonds of WO 4 and WO 6 units are observed around 920 cm À1 , defining the phonon energy of TW glass [5], while for TL glass the phonon energy is around 750 cm À1 , corresponding to the stretching vibrational mode of TeeO in the trigonal-pyramid units [20]. From the spectra it can be noted that the ratio of the intensities of absorptions associated to the TeO 4 trigonal bipyramid units (at 670 cm À1 ) and TeO 3þ1,3 trigonal pyramid units (at~750 cm À1 ) is higher in TW than TL glass, what is also related to the observed red shift in the fundamental absorption band.…”