Some 50 ternary sulfides of the type
II‐Ln2‐S4
were explored, where
II=false(normalZn,normalCd,normalMg,normaland Cafalse)
and
normalLn=false(normalSe,Y,normalLa,normalCe,normalPr,normalNd,normalSm,normalGd,normalTb,normalDy,normalHo,normalEr,normalTm,normalYb,normaland Lufalse)
. The structure of the compounds, if they were formed, was investigated with x‐ray diffraction techniques using primarily the materials synthesized in powder form. Single crystals were subsequently grown from the powders for several compounds including
ZnSc2S4
and
CdSc2S4
which were found to have bandgaps of 2.1 and 2.3 eV, respectively, at room temperature. Doping with a variety of impurities provided conducting n‐type specimens for both
ZnSc2S4
and
CdSc2S4
, and for the latter p‐type specimens were also obtained. Weak cathodoluminescence was observed from several compounds including
CaCe2S4
with a green‐yellow and
ZnLu2S4
with a blue‐green emission color.
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