Exciton Binding Energy under Electric Field in ZnTe1-xSx/ZnS Strained-Layer Superlattices
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Conduction and valence band offsets in ZnTe1-xSx/ZnS strained-layer superlattices (SLSs) are calculated as a function of sulfur (S) concentration ($x$). The valence band offsets markedly decreases with increasing $x$ because the energy difference between the band gaps ZnS and ZnTe1-xSx decreases with increasing $x$. Exciton binding energy in the ZnTe1-xSx/ZnS SLSs decreases with increasing ZnTe1-xSx and ZnS layer thickness. This system has two exciton systems under an applied electric field. The energy splitting of the exciton systems increases with increasing electric field strength.
- Jpn J Appl Phys
Jpn J Appl Phys 45(7), 5832-5835, 2006-07-15
INSTITUTE OF PURE AND APPLIED PHYSICS