Measurement of current-voltage characteristic curves of solar cells and solar modules

摘要

A method for measuring the characteristics of a solar cell or a solar module, the method comprising the steps of: applying a light pulse to the solar cell or the solar module, such that a connection current is generated at the terminals of the solar cell or the solar module; Increasing a terminal voltage at the terminals of the solar cell or the solar module with decreasing connection current or decreasing the terminal voltage with increasing terminal current during the light pulse; and measuring the terminal current and the terminal voltage at instantaneous intensities during the light pulse; in which the terminal voltage varies substantially according to the equation terminal voltage = K1 - K2 · (terminal current), wherein the values K1 and K2 are positive constants and K2 is nonzero and in which the values K1 and K2 are selected such that the instantaneous current values and the instantaneous voltage values at each illumination intensity during the light pulse compared to the current and voltage values at constant terminal voltage are closer to the current and voltage values at a constant current and a constant voltage at a constant illumination intensity.