current that is the part of the reverse current in a semiconductor diode caused by diffusion of minority carriers from the neutral regions to the depletion region, vool, mis on pooljuhtdioodis oleva tagasivoolu osa, combination of the generation current caused by thermal generation of electron hole pairs within the depletion region of the diode and the diffusion current due to minority carriers in the n and p regions diffusing across the depletion region