Optimal resolution of LBIV/LBIC methods for diagnostics of solar cell homogeneity

Both LBIV and LBIC methods (light beam induced voltage and light beam induced current) are based on measuring either short circuit current I _sc or open circuit voltage V _oc under conditions of local illumination by monochromatic light of a proper wavelength. By positioning the illuminated spot, a map of either I _sc or V _oc can be obtained, from which it is possible to find the distribution of the recombination rate over the area of the solar cell. A map of either I _sc or V _oc , from which the distribution of recombination in individual layers of the cell structure can be found, should be measured within a relatively short time, and high resolution is desirable. This paper deals with the possibility of resolution adjustment for the LBIV method, and maps of crystalline silicon in these resolutions are presented.