Abstract Cd0.99Zn0.01S/ZnO nanostructured films were developed by solution processing method on ITO/glass substrates with different ZnO thicknesses. Structural, linear, nonlinear optical and photoluminescence properties of the as grown films were analyzed. In x-ray diffraction patterns, Cd0.99Zn0.01S and ZnO peaks were observed clearly. The grain size of the films was estimated to be in the range of 23-25 nm. 2D atomic force microscopy images of the films confirmed the growth of nano size grains. Tauc's plot of the films reveals that the band gap energies are in the range of 2.49 -2.54 eV. Photoluminescence spectra of films showed interesting reduction in the visible emission along with an enhancement in the UV emission with increasing ZnO thickness. The nanocomposite Cd1-xZnxS/ZnO thin film with 20 nm thickness shows high transmittance of about 70 %. Nonlinear optical parameters such as third order nonlinear optical susceptibility, χ(3) and nonlinear refractive index n2 were also roughly estimated. The values of χ(3) and n2 parameters were found to be in the range of 1.73 × 10−13-1.09 × 10−11 esu and 2.6 × 10−12-1.78 × 10−10 esu, respectively.

中文翻译：

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用于光电应用的 Cd0.99Zn0.09S/ZnO 纳米复合薄膜的线性、三阶非线性光学和光致发光特性

摘要 在不同ZnO厚度的ITO/玻璃基板上，采用溶液加工法制备了Cd0.99Zn0.01S/ZnO纳米结构薄膜。分析了生长膜的结构、线性、非线性光学和光致发光特性。在 X 射线衍射图中，可以清楚地观察到 Cd0.99Zn0.01S 和 ZnO 峰。薄膜的晶粒尺寸估计在 23-25 nm 的范围内。薄膜的 2D 原子力显微镜图像证实了纳米尺寸晶粒的生长。Tauc 的薄膜图显示带隙能量在 2.49 -2.54 eV 的范围内。薄膜的光致发光光谱显示，随着 ZnO 厚度的增加，可见光发射明显减少，而紫外光发射增加。20 nm 厚的纳米复合 Cd1-xZnxS/ZnO 薄膜显示出约 70% 的高透光率。非线性光学参数如三阶非线性光学磁化率、χ(3) 和非线性折射率 n2 也被粗略估计。发现 χ(3) 和 n2 参数的值分别在 1.73 × 10-13-1.09 × 10-11 esu 和 2.6 × 10-12-1.78 × 10-10 esu 的范围内。