10. Semiconductor Nanoparticles for Solar Cell Applications
Semiconductor nanoparticles are of great interest due to their unique size dependent, optical properties and potential applications in various Nano electronics and optoelectronics devices. Tin sulphide has received more attention due to its abundance and non-toxicity of its element and the feasibility. Previous studies revealed that the photovoltaic conversion efficiency of a solar cell based on SnS is quiet low. So for the enhancement of the solar cell efficiency on SnS, the one way is to add the doping elements into the SnS nanoparticle. Among various metal ions, Fe and Co have been selected for my work. The nanoparticles are prepared by precipitation method using Sncl2.2H20 and Na2.xH20. The prepared nanoparticles are characterized using X-ray diffraction (XRD), the average size is calculated using scherrer formula. The functional group of the nanoparticle samples with strong bonding nature is observed by Fourier transform infrared spectroscopy (FTIR).The particle size of the samples is found by Particle size analyzer. The surface morphology of the nanoparticles is studied through scanning electron microscopy. The characterization results of the analysis on morphological properties and elemental compositions about the doped samples are carried out by SEM-EDAX. The adsorption properties were determined using photoluminescence study. The observed doping results are compared with SnS nanoparticles were studied and the results were further analyzed for future applications.
Keywords: Tin Sulphide, Precipitation method, X-ray diffraction, Scanning electron microscopy, photoluminence
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