The existing investigation explains the consequence of irradiation of violet laser on the structural properties of MawsoniteCu6Fe2S8Sn[CFTS] thin films. The film was equipped by the utilization of semi-computerized spray pyrolysis technique (SCSPT), it is the first time that this technique is used in the preparation and irradiation using a laser. when the received films were processed by continuous violet laser (405 nm) with power (1W) for different laser irradiation time using different number of times a laser scan (0, 6, 9, 12, 15 and 18 times) with total irradiation time(0,30,45,60,75,90 min) respectively at room temperature. The XRD diffraction gave polycrystalline nature with tetragonal crystal system. The result was that the structure properties of mawsoniteCu6Fe2S8Sn [CFTS] thin films affected by laser irradiation where the XRD measurement the result was the grain size and stress values that decrease with increasing irradiation time, whereas the values of intensity , FWHM and d- spacing for the largest peak increase with a slight increase with the increase in the irradiation time and slight increase in growth of some peaks with increasing irradiation time. While not affected EDX and FTIR measurements by laser irradiation, the result was the same for all samples. As for AFM measurement showed that the surface roughness, root mean square and average diameter values that decrease with increasing irradiation time. Note from SEM measurement that the surface topography affected with different time of irradiation red laser. This result due to laser irradiation worked like annealing temperature to enhance the crystallization of the deposited films. And the results showed that the laser irradiation method has a clear change in the structure properties with less time and energy than the traditional annealing methods which is the aim of this study.

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