HYBRID EXCITED ELECTRONIC STATES IN SEMICONDUCTOR CRYSTALLITES OF DIAMETER z15-50{\AA},
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Date
1985
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Ohio State University
Abstract
The electronic properties of metals and semiconductors result from extensive delocalization of the atomic valence electrons. These properties develop only gradually with cluster size. We synthesize and structurally characterize (via the electron microscope) crystalline clusters of the semiconductors ZnS, CdS, and PbS. The clusters are excised fragments of the bulk lattice. However, the lowest excited electronic state lies above the bulk bandgap energy; the excited states are hybrids between the molecular and solid state regimes. We discuss molecular orbital theory for these large ``molecules”.
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Author Institution: AT\&T Bell Laboratories