Anomalous Size-Dependent Decay of Low-Energy Luminescence from PbS Quantum Dots in Colloidal Solution

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

92 Scopus Citations
View graph of relations

Author(s)

  • Aleksandr P. Litvin
  • Peter S. Parfenov
  • Anatoly V. Fedorov
  • Mikhail Artemyev
  • Anatoly V. Prudnikau
  • Ivan D. Rukhlenko
  • Alexander V. Baranov

Detail(s)

Original languageEnglish
Pages (from-to)8913-8921
Journal / PublicationACS Nano
Volume6
Issue number10
Online published12 Sep 2012
Publication statusPublished - 23 Oct 2012
Externally publishedYes

Abstract

We report on an anomalous size dependence of the room-temperature photoluminescence decay time from the lowest-energy state of PbS quantum dots in colloidal solution, which was found using the transient luminescence spectroscopy. The observed 10-fold reduction in the decay time (from ∼2.5 to 0.25 μs) with the increase in the quantum dots' diameter is explained by the existence of phonon-induced transitions between the in-gap state-whose energy drastically depends on the diameter-and the fundamental state of the quantum dots. © 2012 American Chemical Society.

Research Area(s)

  • in-gap electronic state, near-infrared, PbS quantum dots, phonon-induced transitions, photoluminescence decay, quantum transition dynamics, size dependence

Citation Format(s)

Anomalous Size-Dependent Decay of Low-Energy Luminescence from PbS Quantum Dots in Colloidal Solution. / Ushakova, Elena V.; Litvin, Aleksandr P.; Parfenov, Peter S. et al.

In: ACS Nano, Vol. 6, No. 10, 23.10.2012, p. 8913-8921.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review