title: Luminescence study and dosimetry approach of Ce on an α-Sr2 P2 O7 phosphor synthesized by a high-temperature combustion method.
abstract: We report synthesis of a cerium-activated strontium pyrophosphate (Sr2 P2 O7 ) 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 Sr2 P2 O7 has an α-phase with crystallization in the orthorhombic space group of Pnam. The IR spectrum of α-Sr2 P2 O7 displays characteristic bands at 746 and 1190 cm(-1) corresponding to the absorption of (P2 O7 )(-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 Ce(3+) 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.
authors.affiliation: Luminescent Materials Laboratory, Physics Department, The M. S. University of Baroda, Vadodara, 390002, India.
authors.forename: Nimesh P
authors.initials: NP
authors.lastname: Patel
authors.forename: M
authors.initials: M
authors.lastname: Srinivas
authors.forename: Dhaval
authors.initials: D
authors.lastname: Modi
authors.forename: Verma
authors.initials: V
authors.lastname: Vishwnath
authors.forename: K V R
authors.initials: KV
authors.lastname: Murthy
mesh_terms: D002563:Cerium / Q000737:chemistry*; D008029:Lighting / Q000295:instrumentation; D049449:Luminescence; D049408:Luminescent Agents / Q000138:chemical synthesis / Q000737:chemistry*; D008163:Luminescent Measurements; D010710:Phosphates / Q000138:chemical synthesis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013324:Strontium / Q000737:chemistry*; D013696:Temperature; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D049408:Luminescent Agents; D010710:Phosphates; D002563:Cerium; C052774:strontium phosphate; D013324:Strontium
keywords: X-ray diffraction; combustion method; photoluminescence; pyrophosphate; thermoluminescence