Abstract
The SiO2-coated Sr4A114O25:Eu2+, Dy3+/light conversion agent yellow phosphor was prepared by the sol–gel method in alcohol/water system. The morphology, photochromic properties and water tolerance of the samples were analyzed and characterized by using XRD, SEM, FTIR, fluorescence spectrophotometer, spectroradiometer and pH meter. The results reveal that the silica and light conversion agent were successfully coated on the surface of Sr4A114O25:Eu2+, Dy3+. The emission peak shifted from 493 nm (Sr4A114O25:Eu2+, Dy3+) to 606 nm due to the cladding of the light conversion agent (LCA). But with the addition of silica, the property of light conversion agent was influenced by the hydrogen bonds and the electrostatic interactions between silica and light conversion agent. That caused the excitation energy of the light conversion agent risen, and the emission peak have a blue shift from 606 nm (Sr4A114O25:Eu2+, Dy3+/LCA) to 586 nm. Therefore, the composite phosphor was obtained that appeared yellow fluorescence while pink in the daylight. It is also important that the composite yellow phosphors have good water tolerance attributed to the coating of silica.
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 callMore From: Journal of Materials Science: Materials in Electronics
Disclaimer: 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.
