Desired warm white light emission from a highly photostable and single-component Gd2TiO5:Dy3+/Eu3+ nanophosphors for indoor illuminations

摘要: Abstract At present, phosphor-converted white light-emitting diodes (pc-WLEDs), developed by combining an ultraviolet (UV)/near-UV (NUV) LED and a single-component emitting phosphor, have attracted significant interest are emerged as the new-generation green light sources. Herein, we report highly photostable novel Gd2TiO5 (GT):Dy3+/Eu3+ nanophosphors phosphors sol-gel route. Based on X-ray diffraction pattern, Rietveld refinement is performed to authorize orthorhombic phase of GT nanophosphors. The nanosized particles with nearly spherical morphology perceived after annealing at 1100 ℃. Dy3+ Eu3+ ions individually-doped exhibited pleasant reddish-orange emissions monitoring their respective excitation wavelengths. Tunable emission achieved co-doping various concentrations optimized GT:1.5Dy3+ under both UV (270 nm) NUV (362 nm) excitations. energy transfer probability discussed efficiency from calculated luminescence decay profiles. On rising content 0.25 6 mol%, increased 14% 73% for co-doped Besides, samples high quantum efficiencies photostability. Thus, acquired results signifying that these GT:Dy3+/Eu3+ can serve potential and/or NUV-based pc-WLEDs.