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<p>Solid-state reaction (SSR) method was used to prepare undoped and Dy<sup>3+</sup>-doped magnesium cadmium pyrophosphate (MCP) nanopowders (NPs). The average crystallite size was determined using Scherrer’s technique and W–H plot method in the powder X-ray diffraction study. Further, Rietveld refinement was carried out using the GSAS-II software package with Cu K<sub><i>α</i></sub> radiation (<i>λ</i> = 1.5418&#xa0;Å). The surface morphology of the prepared samples shows a clustered pattern that resembles a stone-like structure in FE-SEM analysis. Raman spectral analyses confirmed the presence of the pyrophosphate groups, and FT-IR study was used to assess the vibrational modes of the samples. According to DRS study, optical bandgap values of the prepared samples are in the range 2.99–3.49&#xa0;eV. The PL spectra of the samples exhibit emission at 574&#xa0;nm when excited at 347&#xa0;nm. The maximum emission intensity was observed at 574&#xa0;nm for the 0.01% Dy<sup>3+</sup>-doped MCP sample. The CIE coordinates of Dy<sup>3+</sup>-doped (0.01%, 0.05%, and 0.1%) MCP NP samples are (0.3863, 0.4171), (0.3722, 0.3972), and (0.3969, 0.4311), respectively. Color rendering index (CRI), correlated color temperature (CCT), color purity (CP) and lifetime decay analysis are reported. Photometric data confirm the strong white emission of the prepared samples.</p>

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Spectroscopic and photoluminescent studies of Dy3+ doped MgCdP2O7 nanopowders for white light emitting devices

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • S. V. Balasubramanyam,
  • B. V. Naveen Kumar,
  • K. Srinivasarao,
  • Shaik Azad Basha,
  • Sandhya Cole

摘要

Solid-state reaction (SSR) method was used to prepare undoped and Dy3+-doped magnesium cadmium pyrophosphate (MCP) nanopowders (NPs). The average crystallite size was determined using Scherrer’s technique and W–H plot method in the powder X-ray diffraction study. Further, Rietveld refinement was carried out using the GSAS-II software package with Cu Kα radiation (λ = 1.5418 Å). The surface morphology of the prepared samples shows a clustered pattern that resembles a stone-like structure in FE-SEM analysis. Raman spectral analyses confirmed the presence of the pyrophosphate groups, and FT-IR study was used to assess the vibrational modes of the samples. According to DRS study, optical bandgap values of the prepared samples are in the range 2.99–3.49 eV. The PL spectra of the samples exhibit emission at 574 nm when excited at 347 nm. The maximum emission intensity was observed at 574 nm for the 0.01% Dy3+-doped MCP sample. The CIE coordinates of Dy3+-doped (0.01%, 0.05%, and 0.1%) MCP NP samples are (0.3863, 0.4171), (0.3722, 0.3972), and (0.3969, 0.4311), respectively. Color rendering index (CRI), correlated color temperature (CCT), color purity (CP) and lifetime decay analysis are reported. Photometric data confirm the strong white emission of the prepared samples.