Optical properties of PbSe nanocrystal quantum dots under pressure

Kirill K. Zhuravlev, Jeffrey M. Pietryga, Robert K. Sander, Richard D. Schaller

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Abstract

The optical properties of PbSe nanocrystal quantum dots (NQDs) were studied as a function of applied hydrostatic pressure over the range from ambient to 5.4 GPa. PbSe NQDs exhibit an energy gap that is dominated by quantum confinement. Despite such strong confinement, the authors find that the energy gaps of 3, 5, and 7 nm diameter PbSe NQDs change monotonically with pressure with a dependence that is almost entirely determined by the bulk deformation potential. The sizable dependence of the NQD energy gap with pressure invites applications in the areas of high speed pressure sensing and tunable IR lasers.

Original languageEnglish
Article number043110
JournalApplied Physics Letters
Volume90
Issue number4
DOIs
Publication statusPublished - Feb 5 2007

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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