Photoluminescence and thermoluminescence characteristics of CaAl2Si4O12:Dy3+new phosphor prepared by combustion synthesis

• Published in: Journal of molecular structure 2021-03, Vol.1227, p.129417, Article 129417
• Main Authors: Mehare, C.M., Dhoble, N.S., Ghanty, Chandan, Dhoble, S.J.
• Format: Article
• Language: English
• Subjects: CIE chromaticity; Combustion synthesis; Rietveld, Photoluminescence; Thermoluminescence; w-LED
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2020.129417

•CaAl2Si4O12doped with dysprosium (Dy3+) novel phosphor were synthesized by the combustion method with PL and TL study reported first time.•4F9/2→6H13/2and 4F9/2 → 6H15/2transitions are dominant in CaAl2Si4O12:Dy3+indicates local symmetry.•The corresponding emitting colors of CaAl2Si4O12:Dy3+can be tuned between blue region under UV excitation.•Excitation wavelengths are quite far away from mercury, hence CaAl2Si4O12:Dy3+ is eco-friendly materials for lighting.•This study highlights the CaAl2Si4O12:Dy3+ phosphors as a new and efficient material for w-LED applications.•Significantly linear TL response of the phosphor for both gamma and UV-rays.•Trapping parameters were calculated from thermoluminescence measurements. The present study reported synthesis of Dy3+activated CaAl2Si4O12 phosphor via combustion techniques. The formation of crystal structure and surface morphology was analysed by X-ray diffraction pattern and scanning electron microscopy. The photoluminescence spectrum reveals, the prepared phosphor material exhibits an excellent emission at 422 nm, with two peaks around 479 nm (blue region) and 575 nm (yellow region) monitor at excitation wavelength of near UV 369 nm. In addition, CIE color chromaticity confirms the emission locate at the blue light region, revealed suitability of prepared phosphor in UV excitable blue emission for white light emitting diode. The Thermoluminescence characterization of prepared phosphor irradiated with a 60 Co γ- ray source at dose rate of 7.2 kGy/hr was further carried out using a Nucleonix TL 1009I TL reader. The tapping parameter such as activation energy (E) and frequency factor (s) was calculated using Ilich's method. [Display omitted]