Electrical and photoelectrical properties of iodine modified porous silicon on silicon substrates

摘要

Current-voltage characteristics, spectral dependences of photovoltage andudshort-circuit current of the structures based on porous silicon at adsorption of iodineudmolecules are presented. It is revealed widening the spectral range of photosensitivity inudthe samples in short-wavelength range as compared with that of single crystal silicon.udKinetics of the photovoltage response inherent to the porous silicon-silicon structures hasudbeen investigated. The results are explained in the frame of qualitative model thatudinvolves formation of p-n-transitions in these structures as a result of inversion of theudconductivity type in porous silicon nanocrystals under the influence of adsorption ofudmolecular iodine