Blue Emitting BaAl2O4:Ce3+ Nanophosphors with High Color Purity and Brightness for White LEDs. (December 2019)

• Record Type: Journal Article
• Authors: Chatterjee, Rituparna; Saha, Subhajit; Panigrahi, Karamjyoti; Ghorai, Uttam Kumar; Das, Gopes Chandra; Chattopadhyay, Kalyan Kumar
• Is Part Of: Microscopy and microanalysis. Volume 25:Number 6(2019)
• Page Start: 1466
• Page End: 1470
• Publication Date: 2019-12
• Subjects: blue emission, -- rare earth, -- nanophosphors, -- photoluminescence, -- sol-gel, -- white LEDs; Microscopy -- Periodicals; Microchemistry -- Periodicals; 502.82
• DOI: 10.1017/S1431927619014958
• Languages: English
• ISSNs: 1431-9276

Abstract

Abstract: In this work, strongly blue emitting Ce 3+ -activated BaAl2 O4 nanophosphors were successfully synthesized by a sol–gel technique. The crystal structure, morphology, and microstructure of the nanophosphors have been studied by X-ray powder diffraction, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. The photoluminescence spectra show the impact of concentration variation of Ce 3+ on the photoluminescence emission of the phosphor. These nanophosphors display intense blue emission peaking at 422 nm generated by the Ce 3+ 5 d → 4 f transition under 350 nm excitation. Our results reveal that this nanophosphor has the capability to take part in the emergent domain of solid-state lighting and field-emission display devices.