Luminescence and energy transfer processes in Lu2SiO5:Ce3+ scintillator

Growth and luminescence characteristics of cerium-doped yttrium pyrosilicate single crystal

“…As we know, the energy levels of Ce 3+ in crystals are strongly affected by the symmetry and strength of crystal field where Ce 3+ locates. [27] In addition, because the band gap of LPS is larger than that of LSO (7.8 eV [28] and 6 eV [29], respectively) while the PLE and PL peaks of LPS:Ce locate at shorter wavelength direction compared with that of LSO:Ce [30], we infer that the band gap of YPS is also larger than that of LPS. Further research such as the energy level scheme of YPS:Ce is needed to confirm this conjecture.…”

Comparative Study of Nonproportionality and Electronic Band Structures Features in Scintillator Materials

“…Experimental evidence that explicitly quantifies the relative proportion of free charge carriers to excitons has not been found in the literature. However, the scintillation mechanisms in YAP and LuAP [37,38], YAG and LuAG [39,40], YSO [41], LSO [ 42,43], and BGO [44][45][46] have been shown to involve shallow and deep electron and hole traps, therefore suggesting the predominance of free carriers over excitons. The dependency observed in Fig 2b for these scintillator materials, indeed suggests that free electrons and holes are the main energy carriers.…”

Luminescent properties of Na-codoped Lu2SiO5:Ce phosphor

“…4(a), the emission band of Ce 3+ can be decomposed into three components by using Gaussian fittings [16]. Two bands peaking at 392 nm and 420 nm originate from Ce1 center and one band peaking at 452 nm is from Ce2 center.…”

“…The double structure for Ce1 is due to the electronic transition from the lowest 5d energy level to two 4f ground levels from the spin-orbit interaction. The double structure for Ce2 is mostly washed out at room temperature because of the thermal broadening effect [16,17]. All the spectra were normalized to their peak intensities and were shown in Fig.…”