VUV spectroscopy of lanthanide doped fluoride crystals K2YF5

Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+doped CdS quantum dots

“…The quenching of the lifetime of Sm 3+ : 4 G 5/2 level relates to the energy transfer process through cross-relaxation (CR) between Sm 3+ ions. 63 Some energy transfer channels between Sm 3+ ions are illustrated in Fig. 7 .…”

NaGdF4:Eu3+ nanocrystalline: an in-depth study of energy transfer processes and Judd–Ofelt analysis using the luminescence excitation spectrum

“…10,15 With a bandgap of about 9–10 eV, the luminescence from high excitation levels of the RE 3+ ions can be observed for MLnF 4 :RE 3+ . 10,11 Because of these characteristics, the MLnF 4 :RE 3+ nanocrystalline is particularly suitable for the applications of up-conversion and down-conversion luminescence. 10,14,15…”

“…10,11 Because of these characteristics, the MLnF 4 :RE 3+ nanocrystalline is particularly suitable for the applications of up-conversion and down-conversion luminescence. 10,14,15…”

“…Compared to the oxide compounds, the fluoride matrices exhibit some outstanding advantages, such as the wide bandgap and low phonon energy. 6,10 Because of the large bandgap, f-d luminescence of the RE 3+ ion-doped fluoride crystals may be observed. 10,11 The low phonon energy minimizes the loss of excited energy by the multi-phonon process; therefore, the quantum efficiency of the emission levels of RE 3+ ions in fluoride hosts is higher than that in oxide compounds.…”

“…6,10 Because of the large bandgap, f-d luminescence of the RE 3+ ion-doped fluoride crystals may be observed. 10,11 The low phonon energy minimizes the loss of excited energy by the multi-phonon process; therefore, the quantum efficiency of the emission levels of RE 3+ ions in fluoride hosts is higher than that in oxide compounds. 11,12 In addition, the weak crystal-field effect contributes to creating the narrow emission bands of RE 3+ iondoped fluoride crystals.…”