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Dimensional reduction in II‐VI materials: A 2 Cd 3 Q 4 (A = K, Q = S, Se, Te; A = Rb, Q = S, Se), novel ternary low‐dimensional cadmium chalcogenides produced by incorporation of A 2 Q in CdQ
Author(s) -
Axtell Enos A.,
Liao JuHsiou,
Pikramenou Zoe,
Kanatzidis Mercouri G.
Publication year - 1996
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.19960020609
Subject(s) - ternary operation , photoluminescence , crystallography , chemistry , context (archaeology) , band gap , chalcogen , analytical chemistry (journal) , materials science , physics , condensed matter physics , paleontology , optoelectronics , computer science , biology , programming language , chromatography
The synthesis of the isomorphous, layered chalcogenides K 2 Cd 3 S 4 ( I ), Rb 2 Cd 3 S 4 ( II ), K 2 Cd 3 Se 4 ( III ), Rb 2 Cd 3 Se 4 ( IV ), and K 2 Cd 3 Te 4 ( V ) in molten A 2 Q x fluxes in reported (A = K, Rb; Q = S, Se, Te; x = 2 to 3). The compounds form as (Cd 3 Q 4 ) n 2n−layers interspersed with A + cations; the layers are composed of Cd 3 Q 2− 4 units shaped as truncated cubes. The compounds have room‐temperature band gaps of 2.75, 2.92, 2.36, 2.37, and 2.26 eV for I, II, III, IV , and V , respectively, and also display strong photoluminescence. The thermal analysis data for all compounds are reported. The properties of these compounds are compared with those of the three‐dimensional compounds CdS, CdSe, and CdTe, as well as those of the nanometer‐sized CdQ clusters. A conceptual context is presented to connect all these different types of compounds.