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Impact of ligand environment on optical, luminescence and thermometric behavior of A3 (PO4 )2 :Sm3+ (A = Ca, Sr) phosphors.
Singh, Rajan; Manhas, Mohit; Bedyal, Ankush Kumar; Durani, Fahim; Swart, Hendrick C; Kumar, Vinay.
Afiliación
  • Singh R; Department of Physics and Astronomical Sciences, Central University of Jammu, Samba, India.
  • Manhas M; Department of Physics and Astronomical Sciences, Central University of Jammu, Samba, India.
  • Bedyal AK; Department of Physics, School of Sciences, Cluster University of Jammu, Jammu, India.
  • Durani F; Solid State Physics Laboratory, Lucknow Road, Timarpur, New Delhi, India.
  • Swart HC; Department of Physics, University of the Free State, Bloemfontein, South Africa.
  • Kumar V; Department of Physics and Astronomical Sciences, Central University of Jammu, Samba, India.
Luminescence ; 2023 Dec 26.
Article en En | MEDLINE | ID: mdl-38148293
ABSTRACT
The present study investigates the impact of the ligand environment on the luminescence and thermometric behavior of Sm3+ doped A3 (PO4 )2 (A = Sr, Ca) phosphors prepared by combustion synthesis. The structural and luminescent properties of Sm3+ ions in the phosphate lattices were investigated using powder X-ray diffraction (PXRD) and photoluminescence (PL) techniques. PXRD results of the synthesized phosphors exhibit the expected phases that are in agreement with their respective standards. Fourier-transform infrared (FTIR) spectroscopy confirms the presence of PO4 vibrational bands. Upon excitation with near ultraviolet light, the PL studies indicated that Sr3 (PO4 )2Sm3+ phosphors exhibit a yellow light emission, whereas Ca3 (PO4 )2Sm3+ phosphors exhibit an emission of orange light. The PL emission results are in accordance with the CIE coordinates, with the Sr3 (PO4 )2Sm3+ phosphors showing coordinates of (0.56, 0.44), and the Ca3 (PO4 )2Sm3+ phosphors displaying coordinates of (0.60, 0.40). Thermal analysis shows improved stability of Ca3 (PO4 )2Sm3+ based on lower weight reduction in thermogravimetric analysis. The effect of temperature on the luminescence properties of the phosphor has been examined upon a 405 nm excitation. By using the fluorescence intensity ratio (FIR) method, the temperature responses of the emission ratios from the Sm3+ the 4 F3/2 → 6 H5/2 transition to the 4 G5/2 → 6 H7/2 and 4 F3/2 → 6 H5/2 transition to the 4 G5/2 → 6 H9/2 emissions are characterized. The Ca3 (PO4 )2Sm3+ phosphors are more sensitive as compared with the Sr3 (PO4 )2Sm3+ phosphors. The earlier research findings strongly indicate that these phosphors hold great promise as ideal candidates for applications in non-invasive optical thermometry and solid-state lighting devices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Luminescence Asunto de la revista: BIOFISICA / BIOQUIMICA Año: 2023 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Luminescence Asunto de la revista: BIOFISICA / BIOQUIMICA Año: 2023 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido