Enhanced broadband near-infrared luminescence from Pr3+-doped tellurite glass with silver nanoparticles

On the prospects of enhance glass based devices with silver nanoparticles: The case of Pr3+ doped tellurite-tungstate glasses

“…In the literature Rajesh et al observed the plasmon band at 492 nm in oxyfluoro tellurite glasses [18], very similar to the findings of Cheng et al (plasmon band at 510 nm in zinc tellurite glasses [23]) and Reza Dousti (plasmon band at 522 nm in sodium lead tellurite glasses [34]). Moreover, we conclude that the broad band observed in Ag doped samples near 500 nm in Figure 4 surface plasmon resonance in Ag nanoparticles incorporated into the TWNN glass.…”

“…In general, a glass with ∆T greater than 100 • C can be used as a feedstock for the production of optical fibers [20,25]. As can be seen from Table 1 the addition of Ag increased the stability in about 70 • C. Such effect is significantly higher than the observed in other similar glasses [23].…”

“…No sharp peak was observed, which indicates the absence of periodicity of the threedimensional network in long range, typical of crystalline materials [20,19,21]. It was observed only a broad peak around 27 • of 2θ, which is characteristic of the amorphous nature of the tellurite glasses [4,22,23].…”

“…This is an important parameter of the potential to manufacturing devices, namely of optical fibers, where the glass will undergo a reheating process. Being subjected to heating cycles, undesirable crystallization may occur and even in small quantities the crystallization may cause significant light scattering, i.e., attenuating the optical signal and compromising the gain [23,24] achieved in amplifiers.…”

Glass engineering to enhance Si solar cells: a case study of Pr$^{3+}$-Yb$^{3+}$ codoped tellurite-tungstate as spectral converter

“…On the other hand, Ag nanoparticles (NP) may enhance the local field of the rare-earth ion site and the energy absorbed by surface plasmon resonance of the electrons in the NP can be transfered to the rare-earth [13,14,15,16,17,18,19,20,21,22]. Lima et al [23] and Garcia et al [24] have studied tellurites as downconverters based in Eu 3+ doping and Ag nanoparticles codoping, where UV/Blue photons are converted to orange photons, which are better suitable to generate current in the silicon SC.…”