Photoluminescence, radioluminescence and thermoluminescence properties of Eu3+ doped cadmium tantalate phosphor

• Published in: Dalton transactions : an international journal of inorganic chemistry 2018-10, Vol.47 (39), p.13939-13948
• Main Authors: lhan, Mustafa, Keskin, lker Çetin
• Format: Article
• Language: English
• Subjects: Chemical synthesis; Dopants; Europium; Glow curves; Heating rate; Phosphors; Photoluminescence; Pollution monitoring; Scanning electron microscopy; Scintillation; Thermoluminescence; Ultraviolet radiation; X-ray diffraction
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c8dt02395f

For investigate spectroscopic properties, Eu 3+ doped columbite type CdTa 2 O 6 phosphors were synthesized using the solid state reaction method. The synthesized ceramic phosphors were investigated by X-ray diffraction (XRD), scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), photoluminescence (PL), radioluminescence (RL) and thermoluminescence (TL) analyses. CdTa 2 O 6 :Eu 3+ phosphors exhibited emissions at 591.8 nm and 612.1 nm because of the characteristic band transitions of the Eu 3+ ion. Phosphor emission increased with increasing Eu 3+ ion dopant up to 1.5 mol%, and then decreased owing to concentration quenching. The decay times decreased with increasing Eu 3+ dopant, while they were varied from 711 to 534 μm. The scintillation emissions of Eu 3+ doped samples from the UV to near-IR spectral region were monitored by RL measurements. The high RL emission may be attributed to the good scintillation property of phosphor. TL glow curves were monitored for different Eu 3+ concentrations in the range of 50 °C to 400 °C at a heating rate of 2 °C s −1 , after being irradiated under short-wave UV light (254 nm). For investigate spectroscopic properties, Eu 3+ doped columbite type CdTa 2 O 6 phosphors were synthesized using the solid state reaction method.