Rahul Pali, Mohammad Ziyauddin Khan, Aastha Sahu, R. P. Patel
{"title":"掺杂钕的硅酸盐的 UCPL、光致发光和热致发光特性的表征与研究","authors":"Rahul Pali, Mohammad Ziyauddin Khan, Aastha Sahu, R. P. Patel","doi":"10.1007/s13538-024-01518-7","DOIUrl":null,"url":null,"abstract":"<p>This paper reports the spectral and kinetic features of the up- and downconversion photoluminescence (PL) of (1%, 2%, 3%, 4%, and 5%) Nd-doped BaSrSiO<sub>4</sub> silicates to elucidate the fundamental processes of UCPL. This manuscript discusses the energy transition levels and potential excitation processes. The sol-gel method was utilized for synthesizing Nd-doped BaSrSiO<sub>4</sub> nanocrystals, which were then annealed at 600 °C to produce silicates. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the crystal phase and nanocrystal formation of the synthesized Nd-doped BaSrSiO<sub>4</sub> powders. When activated by various UV–visible wavelengths, the PL downconversion (DCPL) from a sample exhibits well-resolved bands with sub-split lines centered at 890 nm associated with the near-infrared transitions in Nd<sup>3+</sup> ions. Quenching occurred at 5% doping due to multipolar interactions, indicating that 4% doping is appropriate for temperature sensing applications. Conversely, a visible upconversion PL (UCPL) has been found when excited by a pulsed laser of 800 nm. Furthermore, the suggested energy levels for the upconversion process were verified using the UCPL and photoluminescence excitation (PLE) data. Our results imply that the excited-state absorption mechanism (ESA) in rare earth (Nd)-doped BaSrSiO<sub>4</sub> is most likely a potential mechanism of the UCPL process. The TL glow peak shows the highest intensity for 4 mol% Nd<sup>3+</sup>-doped BaSrSiO<sub>4</sub> at 88 °C. Quenching at 5% was observed due to the dissipation of the trapping centers.\n</p>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Characterization and Investigation of the UCPL, Photoluminescence, and Thermoluminescence Properties of Neodymium-Doped Silicates\",\"authors\":\"Rahul Pali, Mohammad Ziyauddin Khan, Aastha Sahu, R. P. Patel\",\"doi\":\"10.1007/s13538-024-01518-7\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>This paper reports the spectral and kinetic features of the up- and downconversion photoluminescence (PL) of (1%, 2%, 3%, 4%, and 5%) Nd-doped BaSrSiO<sub>4</sub> silicates to elucidate the fundamental processes of UCPL. This manuscript discusses the energy transition levels and potential excitation processes. The sol-gel method was utilized for synthesizing Nd-doped BaSrSiO<sub>4</sub> nanocrystals, which were then annealed at 600 °C to produce silicates. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the crystal phase and nanocrystal formation of the synthesized Nd-doped BaSrSiO<sub>4</sub> powders. When activated by various UV–visible wavelengths, the PL downconversion (DCPL) from a sample exhibits well-resolved bands with sub-split lines centered at 890 nm associated with the near-infrared transitions in Nd<sup>3+</sup> ions. Quenching occurred at 5% doping due to multipolar interactions, indicating that 4% doping is appropriate for temperature sensing applications. Conversely, a visible upconversion PL (UCPL) has been found when excited by a pulsed laser of 800 nm. Furthermore, the suggested energy levels for the upconversion process were verified using the UCPL and photoluminescence excitation (PLE) data. Our results imply that the excited-state absorption mechanism (ESA) in rare earth (Nd)-doped BaSrSiO<sub>4</sub> is most likely a potential mechanism of the UCPL process. The TL glow peak shows the highest intensity for 4 mol% Nd<sup>3+</sup>-doped BaSrSiO<sub>4</sub> at 88 °C. 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Characterization and Investigation of the UCPL, Photoluminescence, and Thermoluminescence Properties of Neodymium-Doped Silicates
This paper reports the spectral and kinetic features of the up- and downconversion photoluminescence (PL) of (1%, 2%, 3%, 4%, and 5%) Nd-doped BaSrSiO4 silicates to elucidate the fundamental processes of UCPL. This manuscript discusses the energy transition levels and potential excitation processes. The sol-gel method was utilized for synthesizing Nd-doped BaSrSiO4 nanocrystals, which were then annealed at 600 °C to produce silicates. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the crystal phase and nanocrystal formation of the synthesized Nd-doped BaSrSiO4 powders. When activated by various UV–visible wavelengths, the PL downconversion (DCPL) from a sample exhibits well-resolved bands with sub-split lines centered at 890 nm associated with the near-infrared transitions in Nd3+ ions. Quenching occurred at 5% doping due to multipolar interactions, indicating that 4% doping is appropriate for temperature sensing applications. Conversely, a visible upconversion PL (UCPL) has been found when excited by a pulsed laser of 800 nm. Furthermore, the suggested energy levels for the upconversion process were verified using the UCPL and photoluminescence excitation (PLE) data. Our results imply that the excited-state absorption mechanism (ESA) in rare earth (Nd)-doped BaSrSiO4 is most likely a potential mechanism of the UCPL process. The TL glow peak shows the highest intensity for 4 mol% Nd3+-doped BaSrSiO4 at 88 °C. Quenching at 5% was observed due to the dissipation of the trapping centers.
期刊介绍:
The Brazilian Journal of Physics is a peer-reviewed international journal published by the Brazilian Physical Society (SBF). The journal publishes new and original research results from all areas of physics, obtained in Brazil and from anywhere else in the world. Contents include theoretical, practical and experimental papers as well as high-quality review papers. Submissions should follow the generally accepted structure for journal articles with basic elements: title, abstract, introduction, results, conclusions, and references.