Photoluminescence of Cu+-doped silica glass prepared by MeV ion implantation

Copper ion as a structural probe in PbO–CaF2–P2O5 glass system by means of spectroscopic and dielectric studies

“…Since this band is not observed in the spectra of CuO free glasses, the band is obviously due to copper ions. More precisely, the band can be attributed to 3 D 1 → 1 S 0 (552 nm) transition of (Cu + ) 2 pairs [45][46][47]. The intensity of the band is observed to be feeble for the glass C 3 and increases gradually with increasing concentration of CuO beyond 0.3 mol%; this inference supports the view point that an increasing reduction of Cu 2+ ions in to Cu + in the samples C 4 to C 6 .…”

Photostimulated optical effects and some related features of CuO mixed Li2O–Nb2O5–ZrO2–SiO2 glass ceramics

“…1 S 0 transition of isolated Cu + ions whereas the yellow emission at about 552 nm is due to 3 D 1 ! 1 S 0 transition of (Cu + ) 2 pairs [38,39]. The more intense nature of these bands in the spectra of the C 25 and C 30 glass ceramic samples suggests that there is a relatively larger proportion of Cu + ions in these samples.…”

Photoluminescence characteristics of sintered silica glass doped with Cu ions using mesoporous SiO2-PVA nanocomposite

“…5 (a). Here, the PL band at~370 nm, together with the shoulder close to 430 nm, can be attributed to the d / s transition of isolated Cu þ [4,12,17,18]. The broad PL band centered at~540 nm is assigned to the d / s transition of the Cu þ eCu þ pairs [4,6,17,18].…”

“…So far, it has been reported that Cu ion-doped silica glasses prepared by the ion implantation and solegel methods exhibit broad PL bands at~400 nm [4,12] or 550 nm [6], which are assigned to isolated Cu þ and Cu þ eCu þ pairs, respectively. However, there is no report on monolithic silica glasses doped with both of the isolated Cu þ and Cu þ eCu þ pairs, which display varied PL characteristics.…”

“…Among the numerous oxide glasses, silica glass seems to be promising candidate as the matrix, because of the inherent larger optical band gap. Considerable efforts have been made toward preparing Cu iondoped silica glasses using several methods, e.g., ion implantation [4] and solegel methods [5]. Previous studies reported that the Cu ions exhibit broad emission spectra in the visible region, wholly dependent on their dispersion/aggregation and valence state in the matrix; the isolated Cu þ [4] and Cu þ eCu þ pairs [6] display emissions at~400 nm and~550 nm, respectively.…”