Optical studies in Er³⁺doped SrY2O4upconverting phosphors for display devices

摘要

The chemical co-precipitation technique have been used to synthesize the Er³⁺doped SrY2Ö4 phosphors. The frequency upconversion (UC) emission spectra in the range 400-900 nm were recorded upon the 980 nm radiation. The UC spectra exhibits five distinct bands peaking at ~ 490 nm, ~ 525 nm, ~ 550 nm, ~ 667 nm and ~798 nm owing to the electronic transitions of Er³⁺ions. The UC mechanism has been described with the suitable energy level diagram and the pump power dependent study. The Commission International de l'Eclairage (CIE) chromaticity diagram shows that the prepared phosphor is capable of emitting in intense green region and thus can be applied in fabricating display devices.