Time-resolved optical studies of piezoelectric effects in wurtzite strained-layer superlattices

X. Chen, P. J. Parbrook, C. Trager-Cowan, B. Henderson, K. P. O'Donnell, M. P. Halsall, J. J. Davies, J. E. Nicholls, P. J. Wright, B. Cockayne

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

CdS-CdSe multilayers form the only known example of a wurtzite, type II superlattice in which lattice strain generates giant piezoelectric fields which modify the band structure. The exciton luminescence band, ascribed to recombination of electrons in CdS layers with holes in CdSe layers, broadens and shifts to lower energy with increasing delay after excitation of the superlattice with a short pulse of light. These effects are interpreted in terms of dynamic band restructuring due to screening of the piezoelectric fields by photogenerated carriers.

LanguageEnglish
Article number014
Pages997-1000
Number of pages4
JournalSemiconductor Science and Technology
Volume5
Issue number9
DOIs
Publication statusPublished - 1 Sep 1990

Fingerprint

Piezoelectricity
Superlattices
Excitons
wurtzite
Band structure
superlattices
Luminescence
Screening
Multilayers
Electrons
screening
excitons
luminescence
shift
pulses
excitation
LDS 751
electrons
energy

Keywords

  • wurtzite
  • strained layer superlattice
  • exciton luminescence

Cite this

Chen, X. ; Parbrook, P. J. ; Trager-Cowan, C. ; Henderson, B. ; O'Donnell, K. P. ; Halsall, M. P. ; Davies, J. J. ; Nicholls, J. E. ; Wright, P. J. ; Cockayne, B. / Time-resolved optical studies of piezoelectric effects in wurtzite strained-layer superlattices. In: Semiconductor Science and Technology. 1990 ; Vol. 5, No. 9. pp. 997-1000.
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Chen, X, Parbrook, PJ, Trager-Cowan, C, Henderson, B, O'Donnell, KP, Halsall, MP, Davies, JJ, Nicholls, JE, Wright, PJ & Cockayne, B 1990, 'Time-resolved optical studies of piezoelectric effects in wurtzite strained-layer superlattices' Semiconductor Science and Technology, vol. 5, no. 9, 014, pp. 997-1000. https://doi.org/10.1088/0268-1242/5/9/014

Time-resolved optical studies of piezoelectric effects in wurtzite strained-layer superlattices. / Chen, X.; Parbrook, P. J.; Trager-Cowan, C.; Henderson, B.; O'Donnell, K. P.; Halsall, M. P.; Davies, J. J.; Nicholls, J. E.; Wright, P. J.; Cockayne, B.

In: Semiconductor Science and Technology, Vol. 5, No. 9, 014, 01.09.1990, p. 997-1000.

Research output: Contribution to journalArticle

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T1 - Time-resolved optical studies of piezoelectric effects in wurtzite strained-layer superlattices

AU - Chen, X.

AU - Parbrook, P. J.

AU - Trager-Cowan, C.

AU - Henderson, B.

AU - O'Donnell, K. P.

AU - Halsall, M. P.

AU - Davies, J. J.

AU - Nicholls, J. E.

AU - Wright, P. J.

AU - Cockayne, B.

PY - 1990/9/1

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N2 - CdS-CdSe multilayers form the only known example of a wurtzite, type II superlattice in which lattice strain generates giant piezoelectric fields which modify the band structure. The exciton luminescence band, ascribed to recombination of electrons in CdS layers with holes in CdSe layers, broadens and shifts to lower energy with increasing delay after excitation of the superlattice with a short pulse of light. These effects are interpreted in terms of dynamic band restructuring due to screening of the piezoelectric fields by photogenerated carriers.

AB - CdS-CdSe multilayers form the only known example of a wurtzite, type II superlattice in which lattice strain generates giant piezoelectric fields which modify the band structure. The exciton luminescence band, ascribed to recombination of electrons in CdS layers with holes in CdSe layers, broadens and shifts to lower energy with increasing delay after excitation of the superlattice with a short pulse of light. These effects are interpreted in terms of dynamic band restructuring due to screening of the piezoelectric fields by photogenerated carriers.

KW - wurtzite

KW - strained layer superlattice

KW - exciton luminescence

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