Doping of CuSc3–xLnxS5 (Ln = Y, Lu) Compounds with the
			Spinel Structure

Razumkova, I. A.; Azarapin, Nikita O.; Seredina, Y. V.; Basova, S.A.

doi:10.1134/s1070363221040186

Cited by 2 publications

(1 citation statement)

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“…[12] However, the preparation of the starting sulfides is often associated with some of difficulties. As mentioned earlier, Sc 2 S 3 is obtained from Sc 2 O 3 by sulfiding at temperatures above 1300 K. [25,41] BaS is usually synthesized via reduction of BaSO 4 in a stream of hydrogen at 1100 K. [42] Cu 2 S is prepared from elemental copper and sulfur, but the ratio of copper to sulfur is 1.995:1 due to the formation of bertholite phases and copper precipitation from stoichiometry. [42] For this reason, it is unproductive to carry out the synthesis by sequential Sc 2 S 3 + Cu 2 S!ScCuS 2 + BaS!BaScCuS 3 or by simultaneous annealing of Sc 2 S 3 + Cu 2 S + BaS.…”

Section: Experimental Section Materialsmentioning

confidence: 99%

Evolution of Structural, Thermal, Optical, and Vibrational Properties of Sc₂S₃, ScCuS₂, and BaScCuS₃ Semiconductors

et al. 2021

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In the present work, we report on the synthesis of Sc 2 S 3 , ScCuS 2 and BaScCuS 3 powders using a method based on oxides sulfidation and modification of their properties. The crystal structures and morphology of samples are verified by XRD and SEM techniques. Thermal stability has been studied by DTA which has revealed that Sc 2 S 3 decomposes to ScS through melting at 1877 K. ScCuS 2 and BaScCuS 3 melt incongruently at temperatures of 1618 K and 1535 K, respectively. The electronic structure calculations show that the investigated compounds are semiconductors with indirect band gap (E g ). According to the diffuse reflection spectroscopy, Sc 2 S 3 , ScCuS 2 and BaScCuS 3 are wide-bandgap semiconductors featured the E g values of 2.53 eV, 2.05 eV and 2.06 eV, respectively. The band gap decreases with the introduction of copper (I) and barium cations into the crystal structure of the compounds. Variation of local structure has been verified by Raman and infrared spectroscopy. The calculated vibrational modes of ScCuS 2 correspond to CuS 4 and ScÀ S layer vibrations, even though ScS 6 octahedra-like structural units can be found in the structure.

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