The influence of silver ion exchange on the luminescence properties of Er-Yb silicate glasses

THE EFFECT OF ZINC CONTENT ON THE ENHANCEMENT Er3+-Yb3+ LUMINESCENCE PROPERTIES IN THE SILICATE GLASS MATRIX

“…% of Ag, the luminescence intensity increased multiple times in comparison with implantation, where the concentration of Ag was approximately 1 %. These results have confirmed our previous results [12,14], where the discussion of the luminescence-enhancement mechanism was mentioned.…”

“…According to [14], the silver concentration -depth profile was characterised by EMA analysis. The depth of the silver-containing layers was about 6 µm and the surface concentration of silver was about 8 mol.…”

Towards a Glass New World: The Role of Ion-Exchange in Modern Technology

“…Similar results have been demonstrated in different Er 3+ /Yb 3+ glass formulations, such as silicate and titanoniobophosphate glasses, where planar waveguides have been fabricated by Ag + /Na + ion-exchange [62,146].…”

“…Moreover, these embedded noble metal ions and nanoparticles played-and still do-an important role in the luminescence properties of the same ion-exchanged host materials especially when these are doped with elements belonging to the rare earth group, mitigating the limitation imposed on their concentration due to the occurrence of quenching phenomena. From the early works of Malta et al [54] and Hayakawa et al [55], the research literature on this topic has highlighted different reasons concerning the origin of the rare earth luminescence enhancement in optical glasses chemically treated by ionexchange, depending on the nanostructure sizes so realized: (i) an energy transfer (ET) process between the energy levels of the noble metal ions (such as isolated Ag + , Ag + -Ag + pairs or silver aggregates) and those belonging to rare earths ions; (ii) an ET mechanism among non-plasmonic small metal nanoparticles (i.e., molecule-like nanoparticles having few nanometres size) and the doping active elements; (iii) a local field enhancement around the rare earth ions due to the surface plasmon resonance (SPR) phenomenon induced in small metal nanoparticles [54][55][56][57][58][59][60][61][62][63][64][65][66]. In the technological field, the aforementioned mechanisms-together with the down/up-conversion ones-have favoured the use of these ion-exchange glass systems in the photovoltaic sector in order to increase the solar cell efficiency through tailored cover-glasses and in the development of low cost and high performance white/coloured solid-state light sources [67][68][69][70][71][72][73][74][75][76][77][78][79][80][81].…”