Energy transfer from the host excitations to Ce3+ ions in scandium borate

Growth and scintillation properties of cerium doped lutetium scandium borate single crystals

“…We propose that the intrinsic emission of the host crystal directly and/or indirectly caused slow emission of (Lu 0.9 Sc 0.1 ) 1Ày Ce y BO 3 . Feofilov et al have reported an energy transfer from self trapped excitons (STE) to the Ce 3+ ion in ScBO 3 [5]. A similar phenomenon would happen in (Lu 0.9 Sc 0.1 ) 1Ày Ce y BO 3 .…”

The influence of Sc/Lu ratio on the phase transformation and luminescence of cerium-doped lutetium scandium orthoborate solid solutions

“…0.1 at.%, 0.3 at.%, and 0.5 at.%. This broad emission band can be ascribed to the self-trapped exciton (STE) emission [25]. Observed from the PL excitation spectrum and XEL spectra, the Ce 3+ ion excitation state of the lowest crystal field component of the 5d energy level does not overlap well with the STE emission band, and a good overlap can be expected with the higher-lying 5d levels of Ce 3+ .…”

“…Hence, it is suggested that the efficient energy transfer from the STE to Ce 3+ could takes place according to the Forster-Dexter dipole-dipole energy transfer theory [26]. In addition, Feofilov et al [25] reported an energy transfer from Fig. 2.…”

Luminescence characteristics of Lu0.8Sc0.2BO3:RE3+ (RE=Eu, Tb) polycrystalline powders

“…In Fig. 3a, the un-doped sample presents a self- trapped exciton (STE) emission band peaking at 260 nm [33]. For Lu 0.8 Sc 0.2 BO 3 :Eu 3+ samples, beside a STE band, the spectrum is constituted of peaks corresponding to 5 D 0 → 7 F J (J = 0-3) transitions of Eu 3+ ions.…”