Spectra and kinetics of dye-sensitized photovoltaic effect in silicon
DOI:
https://doi.org/10.33910/2687-153X-2025-6-3-134-138Keywords:
silicon with different types of conductivity, silicon with an adsorbed dye, photo-EMF, DC photoconductivity, dye sensitization of photovoltaic effectsAbstract
This paper investigates the action of organic dye molecules placed on the surface of semiconductors
on the manifestation of the photovoltaic effect in silicon samples with different types of conductivity. Spectral
sensitization is observed in the dye absorption band of the photo-EMF for monocrystal samples with n-type
conductivity, and a desensitizing effect of the dye is found in samples with p-type conductivity. In addition,
the kinetics of the photovoltaic effect in the region of dye absorption in semiconductors with different types
of conductivity is different: in n-type silicon, a monotonic increase of the photo-EMF is observed, while
in p-type silicon, the photo-EMF first increases and then decreases. In powder samples, effective sensitization
of DC photoconductivity is observed for both n-type and p-type semiconductors. The difference of contributions
of electrons and holes generated during nonradiative inductive-resonant energy transfer from a dye
to a semiconductor to different types of photoelectric effect is discussed.
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