Perfection factors of photovoltaic cells with p-n junction structure

In this work research results for photovoltaic cells with different efficiencies and fill factors are given. Perfection factors´ expressions are theoretically derived using modified Bessel functions. Bessel functions have arguments that proportional to temperature, p-n junction´s m factor and amplitudes of used harmonic voltages with different frequencies. It is determined that the integral perfection index is the most differential frequency voltage´s value measured when load is less than effective resistance of photovoltaic structure with p-n junction.