Annealing Temperature dependent properties of CZTS Nanoparticles

R Lydia, P Sreedharareddy

Abstract


Nanotechnology is used in many fields of science and technology including photovoltaics. Recently the copper zinc tin sulphide (CZTS) nanoparticles have been attracted researchers with its unique properties and as they play crucial role in the application of absorber layer in the solar cell. CZTS nanoparticles have been successfully synthesized by chemical co-precipitation method at room temperature and air annealed at various temperatures of 80oC, 100oC and 120oC. The samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). XRD studies showed the peaks at 2θ values of 28.5o, 32.9o and 47.4o which corresponds to (112), (200) and (220) orientations with increased intensity. From the Raman analysis it was observed that all the samples showed the peak at 337 cm-1 which corresponds to the tetragonal structure of the CZTS nanoparticles. The morphology of the nanoparticles with the samples annealed at 80oC, 100oC and 120oC had distinct grains. However, the as-synthesized sample shows the smeary surface morphology. The sample annealed at 100oC shows near stoichiometry and on further increasing the annealing temperature the composition of sulphur was decreased due to volatile nature of the sulphur.

Keywords


CZTS, nanoparticles, solar cell.

References


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