Abstract
The fundamental optical absorption of Cs4PbBr6 crystals,which are built up of nearly regular Pb2+(Br-)6octahedra mutually bound by Cs+ ions, exhibits novel features:despite the crystalline entity of Cs4PbBr6, it showsoscillator-like absorption peaks and a wide window just above thefirst peak. The Cs+ ions prevent the Pb2+ 6s and 6p statesfrom taking part in the construction of extended states. These statesform a set of localized states confined to within respectiveoctahedra, similar to the case of isolated Pb2+ ions doped inface-centred cubic alkali halide crystals.
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Schedule a callMore From: Journal of physics. Condensed matter : an Institute of Physics journal
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