In the visible region of spectral distribution, the photoconductivity of long wavelength in amorphous Se thin films showed an increase but that of short wavelength showed a decrease. After the sample was illuminated with high intensity white light for...
In the visible region of spectral distribution, the photoconductivity of long wavelength in amorphous Se thin films showed an increase but that of short wavelength showed a decrease. After the sample was illuminated with high intensity white light for three hours at low temperature, we observed that the magnitude of the photoconductivity depended only on the spectral composition of the incident light and the dark conductivity showed a strong dependence on the wavelength to which the sample had been exposed beforehand at 100 K, which is called an anomalous photoconductivity. We believe that the mercuries in amorphous selenium film have generated the long-life traps contributing to the anomalous photoconductivity of samples. The height of the barrier generated by the long life traps was 2.4 eV