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用于柔性光电子学的γ辐射诱导合成新型PVA/Ag/CaTiO纳米复合薄膜

Gamma radiation-induced synthesis of novel PVA/Ag/CaTiO nanocomposite film for flexible optoelectronics.

作者信息

Abdel Maksoud M I A, Abdelhaleem Soraya, Tawfik Eman K, Awed A S

机构信息

Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.

Higher Institute for Engineering and Technology at Manzala, El Manzala, Egypt.

出版信息

Sci Rep. 2023 Jul 31;13(1):12385. doi: 10.1038/s41598-023-38829-9.

DOI:10.1038/s41598-023-38829-9
PMID:37524696
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10390552/
Abstract

A flexible nanocomposite film based on polyvinyl alcohol (PVA), silver nanoparticles, and calcium titanate (CaTiO) was synthesized using gamma radiation induced-reduction. Temperature-dependent structural, optical, DC electrical conductivity, electric modulus, and dielectric properties of PVA/Ag/CaTiO nanocomposite film were investigated. The XRD pattern proved the successful preparation of the nanocomposite film. Also, as the temperature increases, the average crystallite sizes of CaTiO and Ag nanoparticles decrease from 19.8 to 9.7 nm and 25 to 14.8 nm, respectively. Further, the optical band gap increased from 5.75 to 5.84 eV with increasing temperature. The thermal stability is improved, and the semiconductor behavior for PVA/Ag/CaTiO nanocomposite film is confirmed by thermal activation energy ΔE with values in the 0.11-0.8 eV range. Furthermore, the maximum barrier W value was found of 0.29 eV. PVA/Ag/CaTiO nanocomposite film exhibits a semicircular arc originating from the material's grain boundary contributions for all temperatures. The optical, DC electrical conductivity, and dielectric properties of the PVA/Ag/CaTiO nanocomposite film can be suitable for flexible electronic devices such as electronic chips, optoelectronics, and energy storage applications.

摘要

采用γ辐射诱导还原法合成了一种基于聚乙烯醇（PVA）、银纳米颗粒和钛酸钙（CaTiO）的柔性纳米复合薄膜。研究了PVA/Ag/CaTiO纳米复合薄膜的温度依赖性结构、光学、直流电导率、电模量和介电性能。XRD图谱证明了纳米复合薄膜的成功制备。此外，随着温度升高，CaTiO和银纳米颗粒的平均晶粒尺寸分别从19.8nm减小到9.7nm以及从25nm减小到14.8nm。此外，随着温度升高，光学带隙从5.75eV增加到5.84eV。热稳定性得到改善，PVA/Ag/CaTiO纳米复合薄膜的半导体行为通过热激活能ΔE得到证实，其值在0.11 - 0.8eV范围内。此外，发现最大势垒W值为0.29eV。对于所有温度，PVA/Ag/CaTiO纳米复合薄膜都呈现出源自材料晶界贡献的半圆弧。PVA/Ag/CaTiO纳米复合薄膜的光学、直流电导率和介电性能适用于诸如电子芯片、光电子学和能量存储应用等柔性电子器件。

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