Highly efficient near-infrared emission in Er^3+ doped silica films containing size-tunable SnO_2 nanocrystals

Abstract

Co-doping size-tunable SnO2 nanocrystals into Er(3+) ions embedded silica thin films produces an enhancement of Er-related near-infrared emission by three orders of magnitude. Selective PL and PLE measurements show that energy transfer process occurs between SnO2 nanocrystals and Er(3+) ions. Quantitative studies of PL decay lifetime and photoluminescence temperature-dependence demonstrate that both high energy transfer efficiency from SnO2 nanocrystals to Er(3+) ions and the partial incorporation of Er(3+) ions into SnO2 nanocrystals contribute to the near-infrared emission enhancement. All these results indicated that SnO2 nanocrystals with suitable size have great potentials in fabricating high-efficiency near-infrared luminous materials as sensitizers of Er(3+) ions.

Efficient Sensitized Photoluminescence from Erbium Chloride Silicate via Interparticle Energy Transfer

“…Here, the observed stronger diffraction peaks, which occurred in higher Er 3+ concentration samples, indicate increased growth and crystallinity of matrix-embedded Er-related crystals. In other words, the diameter of Er-related crystal shall increase with Er 3+ concentration, which is consistent with the other system of crystal embedded in amorphous matrix [ 26 ]. For samples with a higher Er:Si ratio, the diffraction peaks match well with erbium chloride silicate (ECS) (JCPDS No.…”

Fabrication and surface passivation of porous 6H-SiC by atomic layer deposited films

“…The diameter size of the current porous samples are above 6 nm, which is much greater than the exciton Bohr diameter of 6H-SiC, so the PL in porous samples should not be dominated by quantum size effects. And it could be attributed to surface states on the large internal surface of porous structures, such as oxygen vacancies and dangling bonds [13,16,34]. Surface states generally formed on the porous samples were associated with the chemical reaction during anodic etching process [16][17][18].…”

Enhanced Photoluminescence of Tb3+ Ions Ce3+ Ions and SnO2 Nanocrystals Co-doped Silica Thin Films

“…Our experimental results illustrated that the size of SnO 2 nanoparticles directly affects the sensitization effect of SnO 2 nanoparticles on Tb 3+ ions [13] . The size of SnO 2 nanoparticles prepared by sol-gel method is determined by the concentration of Sn 4+ ions.…”