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Abstract:
In this work a method to image the local efficiency of inhomogeneous solar cells with high spatial resolution is developed. Imaging techniques are used to image spatially resolved loss mechanisms. Previously, lock-in thermography was the most reliable technique to image the saturation current density J01, but it is limited in high data acquisition times and the spatial resolution due to the inevitable thermal blurring. Two alternative luminescence-based methods are developed leading to a reliable J01-distribution with high spatial resolution. The necessity of an image deconvolution of luminescence images is discussed and a method to calculate the correct point spread function is developed. A nondestructive method is developed to separate horizontal and vertical components of the series resistance. This results together with the J01-distribution to a simulation of a measured solar cell based on the finite-element-method.
