Tunable Luminescence in Sr2MgSi2O7:Tb3+, Eu3+Phosphors Based on Energy Transfer

Abstract

A series of Tb3+, Eu3+-doped Sr2MgSi2O7 (SMSO) phosphors were synthesized by high temperature solid-state reaction. X-ray diffraction (XRD) patterns, Rietveld refinement, photoluminescence spectra (PL), and luminescence decay curves were utilized to characterize each sample’s properties. Intense green emission due to Tb3+ 5D4→7F5 transition was observed in the Tb3+ single-doped SMSO sample, and the corresponding concentration quenching mechanism was demonstrated to be a diople-diople interaction. A wide overlap between Tb3+ emission and Eu3+ excitationspectraresults in energy transfer from Tb3+ to Eu3+. This has been demonstrated by the emission spectra and decay curves of Tb3+ in SMSO:Tb3+, Eu3+ phosphors. Energy transfer mechanism was determined to be a quadrupole-quadrupole interaction. And critical distance of energy transfer from Tb3+ to Eu3+ ions is calculated to be 6.7 Å on the basis of concentration quenching method. Moreover, white light emission was generated via adjusting concentration ratio of Tb3+ and Eu3+ in SMSO:Tb3+, Eu3+ phosphors. All the results indicate that SMSO:Tb3+, Eu3+ is a promising single-component white light emitting phosphor.

Optimizing the Mechanoluminescent Properties of CaZnOS:Tb via Microwave-Assisted Synthesis: A Comparative Study with Conventional Thermal Methods

“…Upon increasing the durati wave treatment, this band decreases its importance. As was already indic works [20,35,36], the latter band is due to the presence of oxygen vacanci ated as consequences of the Ca and S vacancies, and can be efficiently uti tizer for the emission at the rare-earth elements site. Further and dedicated should be addressed to fully confirm this assignment.…”

Effect of rare earth doping on optical and spectroscopic characteristics of BaZrO3:Eu3+,Tb3+perovskites

“…The strong Eu 3+ emission due to 4 f-5 d excitation transition of Tb 3+ ions clearly indicates towards the efficient energy transfer from Tb 3+ ions to Eu 3+ ions [52]. This enhancement of emission intensity of Eu 3+ ions is due to radiative energy transfer involving the overlapping of energy levels of Eu 3+ and Tb 3+ ions.…”

Shortwave Ultraviolet Persistent Luminescence of Sr2MgSi2O7: Pr3+

“…Pr 3+ X-rays 231 [26] Sr 2 MgSi 2 O 7 is a promising material to be considered as a UV-C persistent phosphor. Numerous studies have focused on the optical properties of Sr 2 MgSi 2 O 7 systems doped with rare earth (RE) ions [43][44][45][46][47][48][49][50][51][52][53]; moreover, Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ is one of the most efficient blue-emitting persistent phosphors [48][49][50][51][52]. Persistent luminescence is enabled by appropriate lattice defects serving as trapping centres; therefore, the nature of defect types in the host and the effect of RE ion substitution on their activation energies have been the subjects of considerable scientific interest [48][49][50][51][52][54][55][56][57].…”