Abstract
The present article reports the synthesis of LiAlSi3O8 nanophosphor doped with the trivalent Cr ion, synthesized by the conventional high-temperature coprecipitation method. The structural, morphology, photoluminescence and optothermal studies were carried out in detail. The analysis revealed the precipitation of the tetragonal structure of LiAlSi3O8 nanophosphor with an average crystalline size of ∼ 23 nm. The laser (450 nm) excitation was carried out for which samples yielded an intense, broad and asymmetrical emission band centered at 717 nm (orange-red region), corresponds to 2Eg→4A2 g transition of Cr3+ ion. The concentration-dependent, laser power-dependent and thin film analysis of the samples were carried out. The optimum Cr dopant concentration was found to be 0.06 mol%. The optothermal analysis based on the ‘luminescence intensity ratio’ method reveals that the emission intensity variation of states (2Eg and 4T2) may use for temperature estimation and serve as temperature sensor. The calculated value of activation energy ΔE was found to be 1917 cm−1, having maximum relative sensitivity of 3.06 % K−1 at 300 K. The detailed color analysis was also carried out by estimating CIE coordinates for different temperatures and laser powers. A significant variation in the coordinates was observed and discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
