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- Park, Kyoung-Duck
- Nano-PhotoEnergy Lab.
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Activation energy and carrier dynamics of CdTe/ZnTe quantum dots on GaAs and Si substrates
- Author(s)
- Park, Kyoung-Duck, Lee, Hong Seok
- Issued Date
- 2012-06
- Citation
- THIN SOLID FILMS, v.520, no.16, pp.5378 - 5381
- Abstract
- We investigate the activation energy and carrier dynamics of CdTe/ZnTe quantum dots (QDs) grown on GaAs and Si substrates. The activation energy of the electrons confined in QDs on the Si substrate, as obtained from the temperature-dependent photoluminescence (PL) spectra, is lower than that of electrons confined in QDs on the GaAs substrate. Time-resolved PL measurements used to study the carrier dynamics show shorter exciton lifetimes for QDs on the Si substrate. This behavior is attributed to the fact that defects and dislocations in the QDs on the Si substrate provide nonradiative channels.
- Publisher
- ELSEVIER SCIENCE SA
- ISSN
- 0040-6090
- Keyword (Author)
- Quantum dots, Cadmium telluride, Activation energy, Carrier dynamics, Silicon, Gallium arsenide, Substrates, Photoluminescence
- Keyword
- MISORIENTED SI(001), PHOTOLUMINESCENCE
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