چكيده به لاتين
Abstract:
The aim of this study is to investigate the Effect of process parameters on the microstructure and physical properties of deposited ZnS/ZnO (nanostructured) for solar cells application. These layers have wide application in new generation of solar cell. This reaserch has been done in three steps: synthesis of ZnO and ZnS nanoparticles, prepration of stable colloidal soloution of synthesized nanoparticles and deposition of stable colloidal soloution by using electrostatic spray deposition. Synthesis of nanoparticle has been carried out by thermolysis one-step simple method, in this step effect of various parameters including the type of solvent, different precursor, complex formation temperature, type and amount of surfactant, complex decomposition temperature and time were investigated. The effect of these parameters on crystal structure, size and size distribution and absorption in the visible or ultraviolet region has been characterized respectively by X-ray Diffraction, Scanning electron microscopy and UV-Vis analysis. The mechanism of intermediate combinations fourier transform (FTIR) has been analysed to identify linkages made between organic and inorganic materials. This study showed that the suitable temperature for the synthesis of stable colloidal ZnS and ZnO is respectively, 180 ˚C and 150 ˚C. In the final stage thin film deposition has been carried out /min and substrate-to-nuzzle distance 6-10 cm. Thickness and smoothness of these layer have been studied with the help of scanning electron microscopy. In ZnS colloidal (2wt%) optimal conditions for /min. according to the UV- Vis result the band gap of ZnO and ZnS layer after heat treatment, respectively, 3.44 and 3.54 eV.
Keywords: ZnO and ZnS nanoparticle, thermolysis, electrostatic spray deposition.
