Photoconductivity of nanocrystalline SnO2 sensitized with colloidal CdSe quantum dotsстатья
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Дата последнего поиска статьи во внешних источниках: 10 февраля 2016 г.
Аннотация:A highly reproducible photoresponse is observed in nanocrystalline SnO2 thick films sensitized with CdSe quantum dots. The effect of the SnO2 matrix microstructure on the photoconductivity kinetics and
photoresponse amplitude is demonstrated. The photoresponse of the sensitized SnO2 thick films
reaches more than two orders of magnitude under illumination with the wavelength of the excitonic
transition of the quantum dots. Long-term photoconductivity kinetics and photoresponse dependence
on illumination intensity reveal power-law behavior inherent to the disordered nature of SnO2. The
photoconductivity of the samples rises with the coarsening of the granular structure of the SnO2 matrix.At the saturation region, the photoresponse amplitude remains stable under 104 pulses of illumination switching, demonstrating a remarkably high stability.