Quantum-confined Stark effects in CdS1-xSex quantum dots

A. S. Dissanayake, J. Y. Lin, H. X. Jiang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Quantum-confined Stark effects (QCSEs) on exciton-decay dynamics in CdS0.31Se0.69 semiconductor quantum dots (QDs) embedded in a glass matrix have been studied by time-resolved photoluminescence emission spectroscopy under different electric fields up to 2.5×105 V/cm. Under both conditions, in the absence or in the presence of an applied electric field, the exciton luminescence decay in QDs is found to follow the stretched exponential function I(t)=I0exp(-At). The decay rate A and exponent are found to vary linearly with the applied electric field, which can be accounted for by the field-induced reduction of the confined electron and hole wave-function overlap in QDs. The QCSE observed in the QDs is weaker than those observed in semiconductor quantum-well structures.

Original languageEnglish
Pages (from-to)5457-5460
Number of pages4
JournalPhysical Review B
Volume51
Issue number8
DOIs
StatePublished - 1995

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