Abstract In this work, a solution casting method was used to prepare the PbI2/PMMA nanocomposites films. XRD was used to achieve structural characterizations. An increase in an amorphous hump was showed after doping with PbI2 nanostructured. The spectra of FTIR were evaluated between (4000–400 cm−1). The carbonyl stretch band at 1754 cm−1 shifted to higher wavenumber shows the electrostatic interaction between PbI2 and the oxygen of the carbonyl group. Nanocomposites films were identified by scanning electron microscope. The optical UV–Vis–NIR aspects of the nanocomposite films were determined. Increasing the concentration of PbI2 in the investigated samples caused the energy gap to be decreased. Such adjustments in the optical characteristics of the PMMA sample are because of the interaction between the PMMA matrix and the PbI2 nanoparticles. AC electrical conductivity and dielectric properties were studied at room temperature. The dielectric constant increases with increasing the concentration of PbI2. Optical limiting was evaluated and investigated for PbI2/PMMA nanocomposites and the He–Ne and green lasers power was reduced by increasing PbI2 contents. The PbI2/PMMA nanocomposites are promising candidates for solar cells, electronic/optoelectronic devices, and CUT-OFF laser filters.

中文翻译：

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PbI2 掺杂的聚（甲基丙烯酸甲酯）纳米复合薄膜的制备和光谱研究：介电和光学限制方法

摘要 在这项工作中，采用溶液浇铸法制备了 PbI2/PMMA 纳米复合薄膜。XRD用于实现结构表征。掺杂 PbI2 纳米结构后，非晶驼峰增加。FTIR 的光谱在 (4000–400 cm-1) 之间进行评估。1754 cm-1 处的羰基伸缩带向更高波数移动，表明 PbI2 与羰基氧之间的静电相互作用。纳米复合薄膜通过扫描电子显微镜进行鉴定。确定了纳米复合薄膜的光学 UV-Vis-NIR 方面。增加研究样品中 PbI2 的浓度导致能隙减小。PMMA 样品光学特性的这种调整是由于 PMMA 基质和 PbI2 纳米颗粒之间的相互作用。在室温下研究了交流电导率和介电性能。介电常数随着 PbI2 浓度的增加而增加。对 PbI2/PMMA 纳米复合材料的光学限制进行了评估和研究，并通过增加 PbI2 含量来降低 He-Ne 和绿色激光功率。PbI2/PMMA 纳米复合材料是太阳能电池、电子/光电器件和截止激光滤波器的有希望的候选者。