Abstract. The paper investigates the effect of heating of electrons, holes and crystal lattices on the currents of p-n-junction heterostructures. The article analyzes the power of a solar photocell, the dependence of the change in the filling factor and the efficiency of a photocell at different temperatures, on the electrons of the leakage resistance and the base resistance. Theoretical calculations are compared with the current-voltage characteristics, power, filling factor, and efficiency of heterostructures obtained experimentally.

Key words: EMF – electromotive force, base resistance, leakage resistance, filling factor, hot electrons and holes, photoEMF – photoelectromotive force, thermoEMF – thermoelectromotive force, microwave ultrahighfrequency waves, microwave measurement.