Scholarlink

<p>In this study, LaZnO<sub>3</sub> perovskite powders were synthesized via the sol–gel method and annealed at various annealing temperatures (100, 300, 650, and 850&#xa0;°C) to investigate its effect on their structural and optical properties. The samples were characterized in detail using XRD, XPS, FTIR, SEM, UV–Vis, and PL spectroscopy. XRD and XPS analyses confirmed a transition from an amorphous to a well-defined hexagonal perovskite structure with increasing temperature. FTIR results indicated the decomposition of organic residues and the formation of strong metal–oxygen bonds above 650&#xa0;°C. SEM images showed a progression from agglomerated nanoparticles to well-developed faceted crystals, consistent with grain growth and crystallite size evolution. UV–Vis and Tauc analysis indicated a band gap decrease from 3.90 to 3.15&#xa0;eV with increasing temperature, in agreement with quantum confinement effects and structural reorganization. Photoluminescence measurements demonstrated that thermal treatment strongly affected the optical properties, correlating with structural evolution and defect density. This comprehensive study provides valuable insight into the temperature-dependent phase formation and optical behaviour of LaZnO<sub>3</sub> and supports its potential in optoelectronic and photocatalytic applications.</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

Sol–gel synthesis of LaZnO3 perovskite: investigation of temperature-dependent structural and optical characteristics

  • 期刊论文

  • 发表日期：

    2025年10月16日

查看全文
  • Salih Alper Akalin

摘要

In this study, LaZnO3 perovskite powders were synthesized via the sol–gel method and annealed at various annealing temperatures (100, 300, 650, and 850 °C) to investigate its effect on their structural and optical properties. The samples were characterized in detail using XRD, XPS, FTIR, SEM, UV–Vis, and PL spectroscopy. XRD and XPS analyses confirmed a transition from an amorphous to a well-defined hexagonal perovskite structure with increasing temperature. FTIR results indicated the decomposition of organic residues and the formation of strong metal–oxygen bonds above 650 °C. SEM images showed a progression from agglomerated nanoparticles to well-developed faceted crystals, consistent with grain growth and crystallite size evolution. UV–Vis and Tauc analysis indicated a band gap decrease from 3.90 to 3.15 eV with increasing temperature, in agreement with quantum confinement effects and structural reorganization. Photoluminescence measurements demonstrated that thermal treatment strongly affected the optical properties, correlating with structural evolution and defect density. This comprehensive study provides valuable insight into the temperature-dependent phase formation and optical behaviour of LaZnO3 and supports its potential in optoelectronic and photocatalytic applications.