Synthesis and luminescence study of Eu³⁺‐doped SrYAl₃O₇ phosphor

Abstract

Rare-earth ions play an important role in eco-friendly solid-state lighting for the lighting industry. In the present study we were interested in Eu 3+ ion-doped inorganic phosphors for near ultraviolet (UV) excited light-emitting diode (LED) applications.Eu 3+ ion-activated SrYAl 3 O 7 phosphors were prepared using a solution combustion route at 550°C. Photoluminescence characterization of SrYAl 3 O 7 :Eu 3+ phosphors showed a 612 nm emission peak in the red region of the spectrum due to the 5 D 0 → 7 F 2 transition of Eu 3+ ions under excitation at 395 nm in the near-UV region and at the 466 nm blue excitation wavelength. These red and blue emissions are supported for white light generation for LED lighting. Structure, bonding between each element of the sample and morphology of the sample were analysed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), which showed that the samples were crystallized in a well known structure. The phosphor was irradiated with a 60 Co-γ (gamma) source at a dose rate of 7.2 kGy/h. Thermoluminescence (TL) studies of these Eu 3+ -doped SrYAl 3 O 7 phosphors were performed using a Nucleonix TL 1009I TL reader. Trapping parameters of this phosphor such as activation energy (E), order of kinetics (b) and frequency factor (s) were calculated using Chen's peak shape method, the initial rise method and Ilich's method.

Enhanced photoluminescence in RE (Eu3+, Ce3+ and Sm3+)‐activated Ca10(PO4)F2 phosphors by double or triple ionized mineral doping: a comparative study

“…At higher Eu 3+ concentrations, PL intensity decreased due to the concentration quenching effect. [ 30,31 ] Insignificant energy transfer by excited ions to other ions caused an increase in PL intensity of 1 mol% (i.e. cross‐relaxation between Eu 3+ ions).…”

Investigation of thermoluminescence response and trapping parameters of natural barite samples from Dongargaon mine, India

“…were interpreted by Kadam et al . [ 44 ] using these expressions, so that trapping parameters, i.e. activation energy (E), the order of kinetics (b), and frequency factor (s), can be calculated.…”

Luminescence study of Sm3+,Eu3+‐doped Y2Zr2O7 host: optical investigation of greenish yellow to red colour tunable pyrochlore phosphor

“…[36] The voids and porosity noted in the SEM micrographs may be due to the emission of gas and an inappropriate distribution of temperature, respectively, throughout the synthesis. [37,38] The anomaly of molecule size was due to the temperature gradient during sintering. Energydispersive X-ray analysis, also known as energy-dispersive X-ray spectroscopy (EDS) analysis, is a technique used to identify the elemental composition of a sample or small area of interest on the sample.…”