Fourier-transform spectroscopy of the persistent photoconductivity in PbSnTe(In) films at low temperatures

In this work, photoconductivity spectra were studied by the Fourier-transform spectroscopy in the solid solution of Pb_1−xSn_xTe(In) at low temperatures. It is shown that quenching of the persistent photoconductivity in Pb_1–xSn_xTe(In) by radio pulses of very high frequency (100–200 MHz) can be used to ob-tain spectra using a Fourier-transform spectrometer. In the spectra, the interband absorption band was observed, and the temperature dependence of its red cut-off boundary was determined.

Key words: PbSnTe, Fourier transform infrared spectroscopy, photoconductivty, quenching of photoconductivity.

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