Synthesis and Characterization of ZnS/PbS Quantum Dots Nanorods Array Heterostructure

Glass was used as substrates for the synthesis of ZnS/PbS heterostructure using simply one-step thermal evaporation method. The surface morphology and structural studies were carefully researched using various characterization methods such as scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) techniques, X-ray Photoelectron Spectroscopy (XPS), and micro-photoluminescence (PL). Our results indicate that the obtained nanostructures are composed mainly of nanorods with length of few microns and thickness of up 100 nm. The ZnS/PbS nanocrystalline consists of cubic phase and polycrystalline in nature. The photoluminescence performance of the system was investigated. At least one luminescence center gives a red emission under 488 nm excitation is identified. Another luminescence center at 1350 nm could be assigned to the PbS quantum dots, which can be utilized to produce infrared solar cells. Produce efficient infrared solar cells.