Two new ternary chalcogenides Ba2ZnQ3 (Q = Se, Te) with chains of ZnQ4 tetrahedra: syntheses, crystal structure, and optical and electronic properties
2016 ◽
Vol 71
(5)
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pp. 425-429
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Keyword(s):
AbstractSingle crystals of Ba2ZnQ3 (Q = Se, Te) were obtained by solid-state reactions at 1173 K. These isostructural compounds crystallize in the K2AgI3 structure type. The Zn atoms in this structure are coordinated to four Q atoms (2 Q1, 1 Q2, 1 Q3) and these form a distorted tetrahedron around each Zn atom. Each ZnQ4 tetrahedron shares two corners with neighboring ZnQ4 tetrahedra resulting in the formation of infinite chains of [ZnQ44−] units. The absorption spectrum of a single crystal of Ba2ZnTe3 shows an absorption edge at 2.10(2) eV, consistent with the dark-red color of the crystals. From DFT calculations Ba2ZnSe3 and Ba2ZnTe3 are found to be semiconductors with electronic band gaps of 2.6 and 1.9 eV, respectively.
2018 ◽
Vol 74
(2)
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pp. 109-112
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1996 ◽
Vol 51
(4)
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pp. 489-492
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1997 ◽
Vol 52
(5)
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pp. 663-668
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Keyword(s):
1997 ◽
Vol 52
(8)
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pp. 989-993
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2020 ◽
Vol 151
(9)
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pp. 1317-1328
Keyword(s):
1994 ◽
Vol 49
(11)
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pp. 1463-1466
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2015 ◽
Vol 70
(4)
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pp. 279-282
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