Scholarlink

<p>The Ba<sub>1−x</sub>Co<sub>x</sub>TiO<sub>3</sub> (x = 0.2–0.8) (BCT) perovskite nanoparticles are prepared via hydrothermal method. The X-ray diffraction (XRD) confirmed the cubic perovskite structure while specifically, the x = 0.4 sample shows the mixed structure. The microstructure, and selected area electron diffraction patterns clearly show the formation of quantum dots (QDs) for x = 0.4 having the average size of 4&#xa0;nm which can be suggested for quantum technology applications. The Tauc’s plots obtained from UV-Visible spectral analysis confirmed the decrease of optical bandgap (E<sub>g</sub>) from 2.514 to 2.300&#xa0;eV with increase in Co-content in the barium titanate system. The metal oxide bonds (Ba-O, Co-O, and Ti-O) are confirmed using IR-spectra. The Raman spectra of BCT evidences the formation of perovskite structure disclosing the lattice vibrations, and Raman modes of BCT. Further, the photoluminescence (PL) spectra of x = 0.2–0.8 show the perovskite formation pertaining to the emission of different colours (wavelengths). The dielectric constant, and loss dependence of x = 0.2–0.8 as a function of crystallite is elucidated. The U-shaped ac-electrical conductivity behavior as a function of frequency for x = 0.2–0.8 indicates the transition from hopping dominant conduction to polarization dominant mechanism. The relaxation dynamics is illustrated using the dielectric modulus formalism. The Cole-Cole plots reveal that the electrical conduction mechanism of BCT happened alone through grains rather than the grain boundaries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Hydrothermally synthesized BaCoTiO3 quantum dots: Optical, and electrical properties

  • 期刊论文

  • 发表日期：

    2026年4月1日

查看全文
  • Pedda Reddy Yagantigari,
  • S. Dastagiri,
  • M. V. Lakshmaiah,
  • K. Chandra Babu Naidu

摘要

The Ba1−xCoxTiO3 (x = 0.2–0.8) (BCT) perovskite nanoparticles are prepared via hydrothermal method. The X-ray diffraction (XRD) confirmed the cubic perovskite structure while specifically, the x = 0.4 sample shows the mixed structure. The microstructure, and selected area electron diffraction patterns clearly show the formation of quantum dots (QDs) for x = 0.4 having the average size of 4 nm which can be suggested for quantum technology applications. The Tauc’s plots obtained from UV-Visible spectral analysis confirmed the decrease of optical bandgap (Eg) from 2.514 to 2.300 eV with increase in Co-content in the barium titanate system. The metal oxide bonds (Ba-O, Co-O, and Ti-O) are confirmed using IR-spectra. The Raman spectra of BCT evidences the formation of perovskite structure disclosing the lattice vibrations, and Raman modes of BCT. Further, the photoluminescence (PL) spectra of x = 0.2–0.8 show the perovskite formation pertaining to the emission of different colours (wavelengths). The dielectric constant, and loss dependence of x = 0.2–0.8 as a function of crystallite is elucidated. The U-shaped ac-electrical conductivity behavior as a function of frequency for x = 0.2–0.8 indicates the transition from hopping dominant conduction to polarization dominant mechanism. The relaxation dynamics is illustrated using the dielectric modulus formalism. The Cole-Cole plots reveal that the electrical conduction mechanism of BCT happened alone through grains rather than the grain boundaries.