The cadmium sulfide (CdS) and lead sulfide (PbS) materials have been chosen in order to boost solar energy conversion from ultraviolet region to the near-infrared (NIR) spectral region. These materials belonging to the II–VI group have suitable direct band gaps and in solar energy conversion. CdS and PbS layers are used as window and absorber materials, respectively, in solar cells. This paper presents structural, morphological, and optical properties of PbS and CdS thin films prepared by chemical spray pyrolysis at different temperatures as well as its photovoltaic performance. The X-ray diffraction results show the PbS films have cubic structure and CdS films have hexagonal structure. FESEM measurements reveal the films have homogeneous surfaces with spherical particles. Optical analyses exhibit the optical band gap redshifts as the substrate temperature increases. Illumination current density–voltage test of ITO/CdS/PbS/Au heterojunction with different thicknesses of PbS layer has been evaluated. The optimal results are obtained in ITO/CdS/PbS/Au solar cell where thickness of PbS layer is of 0.9 μm with maximum short circuit current, open circuit voltage, and fill factor as well as highest efficiency.

选择了硫化镉（CdS）和硫化铅（PbS）材料，以促进太阳能从紫外线区域到近红外（NIR）光谱区域的转换。这些属于II–VI组的材料具有合适的直接带隙和太阳能转换能力。CdS和PbS层分别用作太阳能电池的窗口和吸收材料。本文介绍了通过化学喷雾热解在不同温度下制备的PbS和CdS薄膜的结构，形态和光学性质，以及其光伏性能。X射线衍射结果表明，PbS膜具有立方结构，CdS膜具有六方结构。FESEM测量表明该膜具有球形颗粒的均匀表面。光学分析显示，随着基材温度的升高，光学带隙会发生红移。对不同厚度的PbS层的ITO / CdS / PbS / Au异质结的照明电流密度-电压测试进行了评估。在ITO / CdS / PbS / Au太阳能电池中可获得最佳结果，其中PbS层的厚度为0.9μm，具有最大的短路电流，开路电压和填充因子，并且效率最高。