Multiple Exciton Generation and Dynamics in InP/CdS Colloidal Quantum Dots

Research output: Contribution to journalArticle

  • External authors:
  • Charles Smith
  • Marina Leontiadou
  • Pip Clark
  • Claire Lydon
  • Nicky Savjani
  • Ben Spencer
  • Paul O'Brien

Abstract

We report measurements of multiple exciton generation and recombination in InP/CdS (core/shell) colloidal quantum dots. Ultrafast transient absorption spectroscopy was used to measure the sub-nanosecond charge dynamics for a range of pump fluences and for different pump photon energies. Analysis of the resulting transients was used to determine the quantum yield of multiple exciton generation, which was found to be 1.22 ± 0.01 for a pump photon energy equivalent to three times the band gap.

Bibliographical metadata

Original languageEnglish
JournalJournal of Physical Chemistry C
Volume121
Issue number4
Early online date6 Jan 2017
DOIs
StatePublished - 2017