Abstract
A new family of five red luminescent powder phosphors of Eu 3+:Ca 4RE (=La,Y, Gd, La+Y, Gd+Y) O(BO 3) 3 has been developed to characterize them spectroscopically in order to identify the most suitable phosphor as the screen coating material based on the measurement of their emission spectra at two excitation wavelengths (290 and 390 nm) and also the red emission lifetimes. The results clearly indicate that the phosphor containing the gadolinium ion Eu 3+:Ca 4GdO(BO 3) 3 demonstrates a brighter and more prominent red color emission and thus enables us to suggest Eu 3+:Ca 4GdO(BO 3) 3 as a novel material of significant importance for potential use as coating material on luminescent screens of electronic systems. For this material, the XRD, FTIR and SEM features have also been investigated to explore the structural details. Besides carrying out these essential measurements, we have also made an attempt to observe a strong red emission performance displayed by this phosphor under an UV source. Among the different emission transitions 5D 0→ 7F J =0, 1, 2, 3, 4, 5 of this phosphor, one particular transition ( 5D 0→ 7F 2) at 611 nm has been found to be hypersensitive in nature which obeys the selection Δ J = 2 in the display of such strong and intense red emission behavior.
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.
