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<p>Polymeric composites based on PVA doped with TiO<sub>2</sub>, WO<sub>3</sub>, and Co<sub>3</sub>O<sub>4</sub> are the subject of the study. A range of physicochemical techniques was used to examine the structure of PVA-based composites. A changing absorption edge for PVA is also seen in the optical studies; it begins at 3.8 eV and drops to 2.4 eV for the PVA-TiO<sub>2</sub>-WO<sub>3</sub> combination. Furthermore, the indirect band gap for all composites doped with TiO<sub>2</sub>, WO<sub>3</sub>, and Co<sub>3</sub>O<sub>4</sub> lowers, reaching 2.8 eV in the PVA-TiO<sub>2</sub>-WO<sub>3</sub> composite. Pure PVA has the greatest value (5.7 eV). The refractive index, on the other hand, shows 1.67 in PVA and 2.08 in PVA-TiO<sub>2</sub>-WO<sub>3</sub> composite. Additionally, the dielectric constant decreased from roughly 28 for PVA and PVA-TiO<sub>2</sub>-WO<sub>3</sub>- Co<sub>3</sub>O<sub>4</sub> composite to less than 20 in PVA-TiO<sub>2</sub>-WO<sub>3</sub>, but increased to ~ 45 in PVA-TiO<sub>2</sub> composite. PVA composites exhibited distinct behavior consistent with previous research, according to optical and dielectric measurements. As a result, the studied NCs offer a potentially helpful composition for optoelectronic applications.</p>

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Optical and dielectric properties of TiO2/WO3/Co3O4/polyvinyl alcohol (PVA) composites for optoelectronic utilizations

  • 期刊论文

  • 发表日期：

    2025年1月18日

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  • Fwzah H. Alshammari

摘要

Polymeric composites based on PVA doped with TiO2, WO3, and Co3O4 are the subject of the study. A range of physicochemical techniques was used to examine the structure of PVA-based composites. A changing absorption edge for PVA is also seen in the optical studies; it begins at 3.8 eV and drops to 2.4 eV for the PVA-TiO2-WO3 combination. Furthermore, the indirect band gap for all composites doped with TiO2, WO3, and Co3O4 lowers, reaching 2.8 eV in the PVA-TiO2-WO3 composite. Pure PVA has the greatest value (5.7 eV). The refractive index, on the other hand, shows 1.67 in PVA and 2.08 in PVA-TiO2-WO3 composite. Additionally, the dielectric constant decreased from roughly 28 for PVA and PVA-TiO2-WO3- Co3O4 composite to less than 20 in PVA-TiO2-WO3, but increased to ~ 45 in PVA-TiO2 composite. PVA composites exhibited distinct behavior consistent with previous research, according to optical and dielectric measurements. As a result, the studied NCs offer a potentially helpful composition for optoelectronic applications.