Time-Resolved Photoconductivity of PbSe Nanocrystal Arrays

James Murphy, Matthew Beard, Arthur Nozik

Research output: Contribution to journalArticlepeer-review

Abstract

We report the sub-picosecond photoconductivity dynamics of chemically treated PbSe nanocrystal arrays utilizing time-resolved terahertz spectroscopy (TRTS). TRTS allows both the degree of interdot electronic coupling and the carrier dynamics to be extracted simultaneously. The following capping ligands bonded to the quantum dot surface were studied:? hydrazine, ethylenediamine, butlyamine, and aniline. In addition, the arrays were treated with NaOH. We find that the treatments affect both the degree of electronic coupling and the carrier dynamics.
Original languageAmerican English
Pages (from-to)25455-25461
Number of pages7
JournalJournal of Physical Chemistry B
Volume110
Issue number50
DOIs
StatePublished - 2006

NREL Publication Number

  • NREL/JA-270-40647

Keywords

  • carrier concentration
  • hydrazine
  • lead compounds
  • molecular structure
  • photoconductivity
  • semiconductor quantum dots

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