Optical absorption spectrum of tin diselenide single crystals

1 March 1976

journal article
research article
Published by AIP Publishing in Journal of Applied Physics

Vol. 47 (3) , 997-1000
https://doi.org/10.1063/1.322693

Abstract

Single‐crystal platelets of n‐type SnSe₂ have been grown by the vapor phase transport technique without using a transport agent. Optical absorption has been studied at 25 °C for light polarized perpendicular to the crystallographic axis of symmetry. Order numbers of interference fringes in the transmission spectrum have been uniquely assigned. Variation of refractive index and absorption coefficeint with energy has been reported. It is found that the intrinsic SnSe₂ absorption edge arises from forbidden indirect transitions across an energy gap of 0.98 eV and allowed direct transitions across an energy gap of 2.1 eV.

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