Luminescence study and dosimetry approach of Ce on an α‐Sr2P2O7 phosphor synthesized by a high‐temperature combustion method. (24th September 2014)

• Record Type: Journal Article
• Authors: Patel, Nimesh P.; Srinivas, M.; Modi, Dhaval; Vishwnath, Verma; Murthy, K. V. R.
• Is Part Of: Luminescence. Volume 30:Number 4(2015:Jun.)
• Page Start: 472
• Page End: 478
• Publication Date: 2014-09-24
• Subjects: Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.2762
• Languages: English
• ISSNs: 1522-7235

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>We report synthesis of a cerium‐activated strontium pyrophosphate (Sr₂P₂O₇) phosphor using a high‐temperature combustion method. Samples were characterized by X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), photoluminescence (PL) and thermoluminescence (TL). The XRD pattern reveals that Sr₂P₂O₇ has an <italic>α</italic>‐phase with crystallization in the orthorhombic space group of Pnam. The IR spectrum of <italic>α</italic>‐Sr₂P₂O₇ displays characteristic bands at 746 and 1190 cm^‐1 corresponding to the absorption of (P₂O₇)^‐4. PL emission spectra exhibit a broad emission band around 376 nm in the near‐UV region due to the allowed 5d–4f transition of cerium and suggest its applications in a UV light‐emitting diode (LED) source. PL also reveals that the emission originates from 5d–4f transition of Ce³⁺ and intensity increases with doping concentration. TL measurements made after X‐ray irradiation, manifest a single intense glow peak at around 192°C, which suggests that this is an outstanding candidate for dosimetry applications. The kinetic parameters, activation energy and frequency factor of the glow curve were calculated using different analysis methods. Copyright © 2014 John Wiley &amp; Sons, Ltd.</p> </abstract>