Studies on the electronic and vibrational states of colloidal CdSe/ZnS quantum dots under high pressures

C. T. Yuan, Y. C. Lin, Y. N. Chen, Q. L. Chiu, Wu-Ching Chou*, D. S. Chuu, W. H. Chang, H. S. Lin, R. C. Ruaan, C. M. Lin

*Corresponding author for this work

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14 Scopus citations

Abstract

The electronic and vibrational states of colloidal core/shell CdSe/ZnS quantum dots are studied at room temperature by using high pressure optical measurements. Pressure-induced quadratic variations of lattice constants can be observed clearly from both photoluminescence (PL) and Raman spectra up to ∼7 GPa. This quadratic relationship is consistent with the theoretical prediction. The pressure coefficients of linear and quadratic terms are 32 meV GPa -1, -1 meV GPa-2 for PL and 4.2 cm-1 GPa -1, -0.1 cm-1 GPa-2 for Raman measurements, respectively.

Original languageEnglish
Article number185402
JournalNanotechnology
Volume18
Issue number18
DOIs
StatePublished - 9 May 2007

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