Abstract

Laser assisted crystal growth and phase transformation of CuInSe2 from thin layers of copper, indium and selenium have been examined in time domain. Such study has not been reported before for any system. Transmitted intensity at wave length of maximum transmittance of CuInSe2 was recorded at the interval of 0.5 ms during the entire process of phase transformation. It has been found that for a threshold power of 160 W/cm2, 500 ms are reguired to convert a system into a thin film of CuInSe2. The final product was examined by Raman spectroscopy. Substantial intermixing of the constituent elements takes place at about 300 ms. If the film is further radiated, then defect states are created causing a considerable reduction in the transmittance.

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