Ag 8 SnSe 6 argyrodite synthesis and optical properties

Abstract

The Ag8SnSe6 argyrodite compound was synthesized by the direct melting of the elementary Ag, Sn and Se high purity grade stoichiometric mixture in a sealed silica ampoule. The prepared polycrystalline material was characterized by the X-ray diffraction (XRD), visible (VIS) and near-infrared (NIR) reflection and photoluminescence (PL) spectroscopy.

XRD showed that the Ag8SnSe6 crystallizes in orthorhombic structure, Pmn21 space group with lattice parameters: а = 7.89052(6) Å, b = 7.78976(6) Å, c = 11.02717(8) Å. Photoluminescence spectra of the Ag8SnSe6polycrystalline wafer show two bands at 1675 nm and 1460 nm. Absorption edge position estimated from optical reflectance spectra is located in the 1413–1540 nm wavelength range.

Citation

Semkiv, I., Ilchuk, H., Pawlowski, M. and Kusnezh, V., 2017. Ag8SnSe6 argyrodite synthesis and optical properties. Opto-Electronics Review.

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Categories: Solar & Photovoltaics

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