Tunable luminescence and electrical properties of cerium doped strontium aluminate (SrAl2O4:Ce3+) phosphors for white LED applications

Ganesh Kumar K; Balaji Bhargav P; Sasikumar P; Anitha Gopalan; Pugazhendhi S; Mary Anjalin F; Vimalan M; Mohamed Abbas

doi:10.1016/j.heliyon.2023.e17429

Tunable luminescence and electrical properties of cerium doped strontium aluminate (SrAl₂O₄:Ce³⁺) phosphors for white LED applications

Heliyon. 2023 Jun 20;9(6):e17429. doi: 10.1016/j.heliyon.2023.e17429. eCollection 2023 Jun.

Authors

Ganesh Kumar K¹, Balaji Bhargav P², Sasikumar P¹, Anitha Gopalan³, Pugazhendhi S¹, Mary Anjalin F¹, Vimalan M¹, Mohamed Abbas⁴

Affiliations

¹ Department of Physics, Saveetha School of Engineering, SIMATS, Thandalam, Chennai, 602105, India.
² Department of Physics, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Tamilnadu, 603110, India.
³ Department of VLSI Microelectronics, Saveetha School of Engineering, SIMATS, Thandalam, Chennai, 602105, India.
⁴ Electrical Engineering Department, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia.

Abstract

In new research growth long after glow material is a potential candidate due to its physical properties, chemical stability and wide application in modern solid-state lightning (LED), display devices, dosimetry and sensors. A cerium doped strontium aluminate phosphor (SrAl₂O₄:Ce³⁺) was synthesized by conventional solid-state reaction method. The crystal structure and morphology of phosphors, while doping rare earth metal and lithium metal ion was investigated by using X-ray diffraction, Raman spectroscopy and field emission scanning electron microscopy. Fourier transformed infrared spectrum results of the synthesized phosphor composition conforms the characteristic vibration bands of synthesized phosphor. Surface composition analysis of the prepared samples was examined using X-ray photoelectron spectroscopy. Photoluminescence emission band observed at ∼420 nm, ∼490 nm and ∼610 nm region under the excitation wavelength of 256 nm. Wight light emission was confirmed using the Commission Internationale de L'Eclairage (CIE) chromatic coordinate graph. The correlated colour temperature (CCT) value of 0.5% Ce³⁺ doped SAO of phosphors was calculated is in the range of 1543 K, which is indicated the synthesized phosphors performance as warm white light source. The obtained phosphor has a high dielectric constant and low loss tangent which is useful to optoelectronic devices.

Keywords: Dielectric; Morphology; Optical; Photoluminescence; White phosphor.