Room Temperature Photoluminescence Surface Mapping

Photoluminescence mapping system using tip illumination/tip collection and tip illumination/far field collection has been described and it is found that the latter collection mode is better suited for luminescence signal collection. Emphasis has been laid on the information that can be gained from the spatial measurements of luminescence emission intensity at single wavelength (topography) and different wavelengths. The results of measurement on CuInS2 thin films prepared using spray pyrolysis technique are presented. Characterization of the defects in the film has been achieved. The effect of non-uniform film deposition on the luminescence has been realized