Role of Valley Anisotropy in Optical Absorption of Monodisperse PbS Nanocrystals

Alexander N. Poddubny, Valentina M. Litvyak, Mikhail O. Nestoklon, Roman V. Cherbunin, Valerii V. Golubkov, Petr A. Onushchenko, Anastasiya N. Babkina, Alexei A. Onushchenko, Serguei V. Goupalov

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

ملخص

We study light absorption by nearly monodisperse PbS nanocrystals grown in a glass matrix. The absorption spectra demonstrate a well-resolved structure at energies above the first absorption peak. The absorption cross sections are calculated with an empirical tight-binding model accounting for the quantum confinement, the band anisotropy, and valley splittings. Absorption spectra measured at 4 K quantitatively agree with the atomistic calculations. This allows us to unambiguously ascribe the much-debated second absorption peak to the p-p optical transition and directly measure the splitting of excited p states.

اللغة الأصليةالإنجليزيّة
الصفحات (من إلى)27766-27773
عدد الصفحات8
دوريةJournal of Physical chemistry c
مستوى الصوت121
رقم الإصدار49
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 14 ديسمبر 2017
منشور خارجيًانعم

All Science Journal Classification (ASJC) codes

  • !!Electronic, Optical and Magnetic Materials
  • !!General Energy
  • !!Surfaces, Coatings and Films
  • !!Physical and Theoretical Chemistry

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