https://doi.org/10.15407/jopt.2017.52.123

Optoelectron. Semicond. Tech. 52, 123-127 (2017)

V.F. Onyshchenko, M.I. Karas’

Calculation of photoconductivity spectra in silicon with surfaces structured with macropores

Specific features of the photoconductivity spectra in silicon with the surfaces structured with macropores depending on the coefficient of reflection from the surface have been calculated. In the presented model of the photoconductivity spectrum, we took into account the multiple reflection of light from these partially reflecting silicon surfaces. Adduced are distributions of the intensity of electromagnetic radiation and excess minority carriers in the structure of macroporous silicon as a function of distance from the illuminated surface. The wavelengths, at which the photoconductivity in the structure of macroporous silicon with two macropores surfaces grows effectively, has been calculated. The distribution of excess minority carriers in the structure of macroporous silicon at the reflection coefficients of 0 and 0.5 under the incidence of the electromagnetic waves 0.95 and 1.05 μm has been shown.

Keywords: macroporous silicon, spectrum, photoconductivity, charge carrier distribution.