Luminescence of lead sulfide nanocrystals in a silicate glass matrix

Journal of Applied Spectroscopy - Tập 77 - Trang 663-667 - 2010
M. S. Gaponenko1, K. V. Yumashev1, A. A. Onushchenko2
1Institute for Optical Materials and Technologies, Belarusian National Technical University, Minsk, Belarus
2Scientific Research and Technological Institute of Optical Material Science, All-Russian Research Center S. I. Vavilov State Optical Institute, St. Petersburg, Russia

Tóm tắt

Luminescence of lead sulfide (PbS) nanocrystals with mean diameter 6 nm in a silicate glass matrix that emit in wavelength region 1.5 μm (0.827 eV) is studied. The average luminescence decay time is estimated to be 2.7 μs. Decreasing the temperature is shown to result in a shift of the emission spectrum to lower energies with a corresponding temperature coefficient of 64 μeV/K. Anti-Stokes luminescence of the PbS nanocrystals is detected with a spectral shift of 45 meV for the emission band maximum relative to the excitation energy.

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