Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1492167 | Materials Research Bulletin | 2007 | 4 Pages |
Abstract
La3S4 is known to crystallize in a defect cubic Th3P4 structure. The effect of alkali metal ion doping in the lacunar La3−xS4 structure has been studied. Compounds with molecular formula La3−xAxS4 (A = Li, Na and K) with varying A/La ratios (0.1, 0.15, 0.2, 0.25 and 0.3) have been synthesized by gas–solid reaction method. The band gap increases with increase in dopant concentration. The optical properties show an increase in yellowness of the doped compositions when compared to the parent phase.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Krishnendu Biswas, U.V. Varadaraju,