Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3291049
Keywords
colloids; excited states; III-V semiconductors; II-VI semiconductors; indium compounds; photoluminescence; semiconductor quantum dots; spectral line shift; time resolved spectra; zinc compounds
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Funding
- National Foundation for Science and Technology Development (NAFOSTED Vietnam) [103.03.35.09]
- CEA-DRI
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This letter reports on the comparative photoluminescence study of InP/ZnS quantum dots in the close-packed solid state and in colloidal solution. The steady-state photoluminescence spectrum of the close-packed InP/ZnS quantum dots peaks at a longer wavelength than that of the colloidal ones. Time-resolved photoluminescence shows that the close-packed quantum dots possess a shorter luminescence decay time and strongly increased spectral shift with the time delayed from the excitation moment in comparison with the colloidal ones. The observed behavior is discussed on the basis of energy transfer enabled by the short interparticle distance between the close-packed quantum dots.
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