Ukrainian Journal of Physical Optics

Luminescence and Reflection Spectra of Sn2P2Se6 Semiconductors-Ferroelectrics at Low Temperatures
¹Vlokh R., ²Grabar O., ²Vysochanskii Yu., ³Dmitruk I.

¹Institute of Physical Optics, 23 Dragomanov St., 79005 Lviv, Ukraine
²Institute for Solid State Physics and Chemistry, Uzhgorod National University, 54 Voloshyn St., 88000 Uzhgorod, Ukraine
³National Taras Shevchenko University of Kyiv, 64 Volodymyrska St., 01033 Kyiv, Ukraine

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We present the luminescence and reflection spectra of semi-conductor-ferroelectric Sn2P2S6 crystals obtained at T=2K. It is found that the photo-excited luminescence has, most probably, exciton origin. The shape of the luminescence band indicates that the luminescence is presumably related to existence of excitons confined by inhomogeneous local field.

Keywords: Sn2P2S6 crystals, luminescence spectrum, reflection spectrum, exciton, semiconductor, ferroelectrics

PACS: 78.55-m, 78 66 Li, 71.35-y, 77.80-e, 64.70.Rh
Ukr. J. Phys. Opt. 7 24-26 doi: 10.3116/16091833/7/1/24/2006
Received: 23.12.2005

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