Strain and piezoelectric potential effects on optical properties in CdSe/CdS core/shell quantum dots

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Strain and piezoelectric potential effects on optical properties in CdSe/CdS core/shell quantum dots (QDs) were investigated theoretically using an eight-band strain-dependent k . p Hamiltonian. The strain effect on the shift of the subband energies is found to be larger than the piezoelectric field effect. As a result, interband transition energies are blueshifted with the inclusion of strain and piezoelectric field effects. We know that the theoretical interband transition energy shows a reasonable agreement with the experimental result. The absolute value of the hydrostatic strain in the QD increases with decreasing QD size, whereas that in the barrier decreases with decreasing QD size. (C) 2011 American Institute of Physics. [doi:10.1063/1.3594743]
Publisher
AMER INST PHYSICS
Issue Date
2011-06
Language
English
Article Type
Article
Keywords

SEMICONDUCTORS; SUPERLATTICES; NANOCRYSTALS; GROWTH

Citation

JOURNAL OF APPLIED PHYSICS, v.109, no.11

ISSN
0021-8979
DOI
10.1063/1.3594743
URI
http://hdl.handle.net/10203/99519
Appears in Collection
PH-Journal Papers(저널논문)
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