Luminescence investigation of red emitting CaAlSiO4F: Eu3+ doped phosphor for white LEDs based on oxyfluoride matrix

Abstract

A series of Eu3+-doped of CaAlSiO4F red-emitting phosphors for different concentrations were successfully synthesized by using high temperature solid state diffusion method. The phase identification of the prepared phosphor was recorded using x-ray diffraction (XRD). In PL study, the emission peak of prepared phosphor was located at 595 nm and 618 nm due to 5D0 → 7F1 and 5D0 → 7F2 transitions at excitation of 257 nm, 395 nm and 465 nm. Morphological behaviour of prepared sample was analyzed by using scanning electron microscope (SEM). Commission de l'Eclairage chromaticity (CIE) coordinates were analyzed based on the PL emission spectra of the series CaAlSiO4F: Eu3+ activated phosphor. Therefore, these possible outcomes indicate that the CaAlSiO4F: Eu3+ products have great potential applications in solid state lighting industry.

Keywords

• WLEDs
• Solid state diffusion
• Red phosphor
• XRD
• SEM