Investigation of Pr3+ Near-Infrared Emission in Plasmonic and Dichroic Copper Nanocomposite Glasses

Monovalent copper-mediated UV to NIR luminescence down-shifting in Yb3+-doped glass

“…24 Then, the addition of Yb 2 O 3 in the CuYb glass increases T g to 473 °C (compared to the Cu reference), while T c approaches that of the Yb glass. T g is in fact higher than that reported for similar glasses prepared with CuO and SnO together with either Pr 2 O 3 29 or Dy 2 O 3 30 determined at around 459 °C and 452 °C, respectively. Thus, an improved thermal stability is indicated for the CuYb glass due to the influence of Yb 3+ ions, which is a desirable characteristic for applications.…”

“…Similar T g values were also reported for the glass prepared with CuO and SnO alongside Pr 2 O 3 after HT at 520 °C for different holding times. 29 However, the crystallization behavior was not examined in ref. 29.…”

“…29 However, the crystallization behavior was not examined in ref. 29. In the present case, the HT which depletes the glass from Cu + ions and leads to the subsequent aggregation of copper atoms into NPs seems to have modified somewhat the crystallization behavior.…”

“…On the other hand, the CuYb-HT glass in Table 2 exhibits a longer rise time followed by a shorter decay time relative to the CuYb parent. The presence of Cu NPs may be behind the shorter decay time; 29 however, the impact on the rise time is a unique outcome that would also require further investigation. In any case, it is possible that apart from the depletion of Cu + ions being detrimental to the sensitization of the Yb 3+ NIR emission, the presence of Cu NPs can also lead to a quenching effect 25,30 especially since the attained ruby-colored nanocomposite herein was not dichroic which could offer beneficial scattering.…”

“…In any case, it is possible that apart from the depletion of Cu + ions being detrimental to the sensitization of the Yb 3+ NIR emission, the presence of Cu NPs can also lead to a quenching effect 25,30 especially since the attained ruby-colored nanocomposite herein was not dichroic which could offer beneficial scattering. 29,45…”