Scholarlink

<p>This work presents a systematic investigation of Rb<sub>2</sub>SnCl<sub>6</sub>-based double perovskite materials, and their halide-substituted derivatives Rb<sub>2</sub>SnCl<sub>2</sub> × <sub>4</sub> (X = Br, I). All three air-stable compounds were synthesized via innovative sol-gel route with simple precursors. Structural analysis by powder X-ray diffraction (XRD), Rietveld refinement confirmed a cubic phase (Fm3m), with defined preferred crystallographic orientation following the incorporation of Br and I. Elemental analysis revealed the incomplete incorporation of Br and I ions into Rb<sub>2</sub>SnCl<sub>6</sub> matrix. Vibrational and optical properties were characterized by RAMAN spectroscopy and UV-Vis spectroscopy. Direct optical bandgap values were determined to be 4.79&#xa0;eV, 3.77&#xa0;eV and 3.59&#xa0;eV for pure, Br-doped, and I-doped Rb2SnCl6 double perovskite, demonstrating significant redshift with an increase in halide ionic radius (I<sup>−</sup>&gt; Br<sup>−</sup>&gt; Cl<sup>−</sup>). SEM and TEM imaging showed slight morphological evolution with substitution. This detailed study of lab-synthesized Rb<sub>2</sub>SnCl<sub>2</sub> × <sub>4</sub> perovskite provides fundamental insights that may guide their application in perovskite-based optoelectronic devices.</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

Investigation of Microstructural and Optical Properties of Sol–Gel Halide-Substituted Rb2SnCl6 Double Perovskite

  • 期刊论文

  • 发表日期：

    2025年6月7日

查看全文
  • K. Oukacha,
  • L. Laânab,
  • M. Aymane Bossi,
  • S. El Hajjaji,
  • B. Jaber

摘要

This work presents a systematic investigation of Rb2SnCl6-based double perovskite materials, and their halide-substituted derivatives Rb2SnCl2 × 4 (X = Br, I). All three air-stable compounds were synthesized via innovative sol-gel route with simple precursors. Structural analysis by powder X-ray diffraction (XRD), Rietveld refinement confirmed a cubic phase (Fm3m), with defined preferred crystallographic orientation following the incorporation of Br and I. Elemental analysis revealed the incomplete incorporation of Br and I ions into Rb2SnCl6 matrix. Vibrational and optical properties were characterized by RAMAN spectroscopy and UV-Vis spectroscopy. Direct optical bandgap values were determined to be 4.79 eV, 3.77 eV and 3.59 eV for pure, Br-doped, and I-doped Rb2SnCl6 double perovskite, demonstrating significant redshift with an increase in halide ionic radius (I−> Br−> Cl−). SEM and TEM imaging showed slight morphological evolution with substitution. This detailed study of lab-synthesized Rb2SnCl2 × 4 perovskite provides fundamental insights that may guide their application in perovskite-based optoelectronic devices.