Photoluminescence properties of Ca 2 Al 2 O 5 :RE 3+ (RE = Eu, Dy and Tb) phosphors for solid state lighting

• Published in: Luminescence (Chichester, England) Vol. 32; no. 7; pp. 1361 - 1364
• Main Authors: Yerpude, Atul N, Panse, Vishal R, Dhoble, Sanjay J, Kokode, Namdeo S, Srinivas, Mudavath
• Format: Journal Article
• Language: English
• Published: England 01.11.2017
• Subjects: Dysprosium - chemistry; Europium - chemistry; Lighting - methods; Luminescent Agents - chemical synthesis; Luminescent Agents - chemistry; Luminescent Measurements; Microscopy, Electron, Scanning; Terbium - chemistry; X-Ray Diffraction; solid state lighting; phosphor; luminescence
• ISSN: 1522-7235; 1522-7243
• DOI: 10.1002/bio.3340

Ca Al O :Eu , Ca Al O :Dy and Ca Al O :Tb phosphors were synthesized using a combustion synthesis method. The prepared phosphors were characterized by X-ray powder diffraction for phase purity, by scanning electron microscopy for morphology, and by photoluminescence for emission and excitation measurements. The Ca Al O :Eu phosphors could be efficiently excited at 396 nm and showed red emission at 594 nm and 616 nm due to D  →  F and D  →  F transitions. Dy -doped phosphors showed blue emission at 482 nm and yellow emission at 573 nm. Ca Al O :Tb phosphors showed emission at 545 nm when excited at 352 nm. Concentration quenching occurred in both Eu and Dy phosphors at 0.5 mol%. Photoluminescence results suggested that the aluminate-based phosphor could be a potential candidate for application in environmentally friendly based lighting technologies.