Room temperature spectral hole burning and elimination of photodarkening in sol-gel derived CdS quantum dots

K. Kang, A. D. Kepner, Y. Z. Hu, Stephan W Koch, Nasser N Peyghambarian, C. Y. Li, T. Takada, Y. Kao, J. D. Mackenzie

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The paper reports on the observed room temperature spectral hole burning in three CdS quantum dot samples with identical particle sizes prepared by the sol-gel process and the conventional glass fusion technique. Room temperature spectral hole burning was utilized as a method to characterize the nonlinearity of the different samples and to understand the origin of the photodarkening effect. It was observed that the difference in the photodarkening mechanism of the three samples is attributed to the different media surrounding the quantum dots. Photodarkening is reduced considerably in the sol-gel samples with high silica content resulting in an approximately 20 times larger nonlinearity compared with the melt-quenched samples. The luminescence efficiency was also observed to be larger in the sol-gel samples.

Original languageEnglish (US)
Pages (from-to)1487-1489
Number of pages3
JournalApplied Physics Letters
Volume64
Issue number12
DOIs
StatePublished - Jan 1 1994

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hole burning
elimination
quantum dots
gels
room temperature
nonlinearity
sol-gel processes
fusion
luminescence
silicon dioxide
glass

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Room temperature spectral hole burning and elimination of photodarkening in sol-gel derived CdS quantum dots. / Kang, K.; Kepner, A. D.; Hu, Y. Z.; Koch, Stephan W; Peyghambarian, Nasser N; Li, C. Y.; Takada, T.; Kao, Y.; Mackenzie, J. D.

In: Applied Physics Letters, Vol. 64, No. 12, 01.01.1994, p. 1487-1489.

Research output: Contribution to journalArticle

Kang, K. ; Kepner, A. D. ; Hu, Y. Z. ; Koch, Stephan W ; Peyghambarian, Nasser N ; Li, C. Y. ; Takada, T. ; Kao, Y. ; Mackenzie, J. D. / Room temperature spectral hole burning and elimination of photodarkening in sol-gel derived CdS quantum dots. In: Applied Physics Letters. 1994 ; Vol. 64, No. 12. pp. 1487-1489.
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