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Investigation of photoluminescence behavior of Gd3+ doped Y2SiO5 phosphor prepared by combustion synthesis method

Kanchan Upadhyay, Sabu Thomas, Raunak Kumar Tamrakar, and Nandakumar Kalarikkal

International and Inter University Centre of Nanoscience and Nanotechnology, Mahatam Gandhi University, Kottyam, India

 

E-mail: kanchan.chesmistry@gmail.com

Received: 16 August 2020  Accepted: 30 January 2021

Abstract:

Gd3+ doped Y2SiO5 powders were prepared by combustion synthesis method. The photoluminescence of as prepared and annealed sample was investigated under UV excitation. Under 254 nm excitation, the phosphor showed main emission peak in UV region at 316 nm attributed transition of Gd3+. According to the relative emission intensity of the sample with different Gd3+ concentration, the optimal Gd3+ substitution for Gd3+ was obtained at 5 mol%. The excitation spectra have peaks at 249 nm, 257 nm and 275 nm. The peak at 257 nm is the intense one and attributed to the charge transfer transition of Gd-O. Mechanism of the emission process is also discussed.

Keywords: Optical materials; Photoluminescence spectroscopy; Y2SiO5 powder

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-01551-9

 

Chemical Papers 75 (7) 3073–3079 (2021)

Wednesday, May 22, 2024

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