Landolt-Börnstein - Group III Condensed Matter

CdS/ZnS, CdS/(Cd,ZnS), and (Cd,Zn)S/ZnS superlattices

Abstract

This chapter discusses the properties of CdS/ZnS, CdS/(Cd,ZnS), and (Cd,Zn)S/ZnS superlattices (SLs). Superlattices from CdS and ZnS are highly strained due to a lattice mismatch of 7.3%. The free-standing lattice parameter of CdS/ZnS strained layer SLs is lattice matched to GaAs or GaP substrates for well/barrier thicknesses of 2.3 nm/1.6 nm or 1 nm/4 nm, respectively. CdS/ZnS have a type-I band alignment. Distinct LO-phonon assisted relaxation of excitons is observed in photoluminescence excitation (PLE) spectra from a Cd0.3Zn0.7S/ZnS SL with well width LW = 7.7 nm and barrier width LB = 8.1 nm. The excitonic PL shows a small dependence on an externally applied electric field attributed to excitonic ionization.

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Title
CdS/ZnS, CdS/(Cd,ZnS), and (Cd,Zn)S/ZnS superlattices
Book Title
Optical Properties. Part 2
In
Superlattices and coupled quantum-well structures of II-VI compounds
Book DOI
10.1007/b98078
Chapter DOI
10.1007/10860224_26
Part of
Landolt-Börnstein - Group III Condensed Matter
Volume
34C2
Editors
  • C. Klingshirn Send Email (10)
  • Editor Affiliation
  • 10 Institut für Angewandte Physik, Universität Karlsruhe (TH), 76131, Karlsruhe, Gemany
  • Authors
  • H. Kalt Send Email (101)
  • Author Affiliation
  • 101 Institut für Angewandte Physik, Universität Karlsruhe (TH), 76131, Karlsruhe, Gemany
  • Cite this content

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