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Blue Emitting BaAl2O4:Ce3+ Nanophosphors with High Color Purity and Brightness for White LEDs

Published online by Cambridge University Press:  26 September 2019

Rituparna Chatterjee ,
Subhajit Saha ,
Karamjyoti Panigrahi ,
Uttam Kumar Ghorai ,
Gopes Chandra Das  and
Kalyan Kumar Chattopadhyay
Rituparna Chatterjee
Affiliation:
School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
Subhajit Saha
Affiliation:
School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
Karamjyoti Panigrahi
Affiliation:
School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
Uttam Kumar Ghorai
Affiliation:
Department of Industrial Chemistry, Swami Vivekananda Research Centre, Ramakrishna Mission Vidyamandira, Belur Math, Howrah 711202, India
Gopes Chandra Das
Affiliation:
School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
Kalyan Kumar Chattopadhyay*
Affiliation:
School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India Department of Physics, Jadavpur University, Kolkata 700032, India
*
*Author for correspondence: Kalyan Kumar Chattopadhyay, E-mail: kalyan_chattopadhyay@yahoo.com
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Abstract

In this work, strongly blue emitting Ce3+-activated BaAl2O4 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 Ce3+ on the photoluminescence emission of the phosphor. These nanophosphors display intense blue emission peaking at 422 nm generated by the Ce3+ 5d → 4f 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.

Keywords

blue emissionrare earthnanophosphorsphotoluminescencesol-gelwhite LEDs
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 25 , Issue 6 , December 2019 , pp. 1466 - 1470
Copyright
Copyright © Microscopy Society of America 2019 

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