PVA/PVP blend embedded with different ratios of nano Cu_0.9Mn_0.1S (Cu/MnS) was prepared with thermolysis and casting techniques. X‐ray diffraction analysis showed the formation of nano Cu/MnS as a single hexagonal phase with an average crystallite size 11 nm. Scanning electron microscope (SEM) revealed nearly homogenous particles morphology. Fourier transform infrared (FTIR) spectroscopy technique was applied to characterize the Cu/MnS doped PVA/PVP matrix. UV measurements were utilized to investigate the optical properties in detail. Upon doping with Cu/MnS, the bandgap of PVA/PVP was significantly decreasing with the amount of doping; which enabling tailoring the band gap depending on the doping content. The analysis showed that the main possible transitions in pure PVA/PVP blend are indirect allowed and direct forbidden. On the other hand, for the doped blend samples, the direct allowed is the main possible transition. Moreover, the refractive index and the real and imaginary parts of the dielectric constant increased upon increasing the Cu/MnS amount doped.

中文翻译：

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通过掺杂Cu / MnS纳米粒子来调整PVA / PVP共混物的光学性能

嵌入不同比例的纳米Cu _0.9 Mn _0.1的PVA / PVP共混物S（Cu / MnS）通过热解和铸造技术制备。X射线衍射分析表明，纳米Cu / MnS形成为单个六方相，平均晶粒尺寸为11 nm。扫描电子显微镜（SEM）显示出几乎均匀的颗粒形态。傅里叶变换红外（FTIR）光谱技术用于表征Cu / MnS掺杂的PVA / PVP基质。利用紫外线测量来详细研究光学性能。掺杂Cu / MnS后，PVA / PVP的带隙随掺杂量的增加而显着降低。从而可以根据掺杂量定制带隙。分析表明，纯PVA / PVP共混物中的主要可能转变是间接允许和直接禁止的。另一方面，对于掺杂的混合样品，直接允许是主要的可能过渡。此外，随着Cu / MnS掺杂量的增加，折射率以及介电常数的实部和虚部都增加。