Exciton–Phonon Interactions and Temperature Behavior of Optical Spectra in Core/Shell InP/ZnS Quantum Dots

  • Sergey Savchenko
  • Alexander Vokhmintsev
  • Ilya WeinsteinEmail author
Part of the Lecture Notes in Nanoscale Science and Technology book series (LNNST, volume 28)


The chapter summarizes research results on temperature evolution of optical absorption spectra in a wide temperature range of 6.5–296 K for colloidal core/shell InP/ZnS quantum dot ensembles with a different size distribution. Exciton–optical transition energies in the InP core and ZnS shell were determined by the second-order derivative spectrophotometry. Numerical analysis within the frame of linear exciton–phonon coupling showed that the shifts of the observed spectral maxima with temperature were due to the interaction of excited states with longitudinal acoustic vibrations. It was established that the half-width of the spectral bands remained unchanged, which indicated the inhomogeneous broadening effect and a high degree of static disorder in the ensembles under study. The semi-phenomenological model was proposed that took into account the effects of the exciton–phonon interaction and allowed one to analyze the influence of the static and dynamic types of atomic disorder on behavior of optical absorption spectra in InP/ZnS quantum dots under temperature variation.


Quantum dot Core/shell Optical absorption Derivative spectrophotometry Half-width Ensemble Temperature dependence Size distribution Semiconductor nanocrystal Static and dynamic disorder Inhomogeneous broadening Exciton-phonon coupling 



This research was supported by RFBR according to the research project no. 18-32-00664 and Act 211 Government of the Russian Federation, contract no. 02.A03.21.0006.


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Authors and Affiliations

  • Sergey Savchenko
    • 1
  • Alexander Vokhmintsev
    • 1
  • Ilya Weinstein
    • 1
    Email author
  1. 1.NANOTECH CentreUral Federal UniversityEkaterinburgRussia

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