Engineering the surface chemistry of lead chalcogenide nanocrystal solids to enhance carrier mobility and lifetime in optoelectronic devices

S. J. Oh, D. B. Straus, T. Zhao, J. H. Choi, S. W. Lee, E. A. Gaulding, C. B. Murray, C. R. Kagan

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

We introduce a stepwise, hybrid ligand-exchange method for lead chalcogenide nanocrystal (NC) thin films using the compact-inorganic ligand thiocyanate and the short organic ligand benzenediothiolate. Spectroscopic and device measurements show that hybrid exchange enhances both carrier mobility and lifetime in NC thin films. The increased mobility-lifetime product achieved by this method enables demonstration of optoelectronic devices with enhanced power conversion and quantum efficiency.

Original languageEnglish
Pages (from-to)728-731
Number of pages4
JournalChemical Communications
Volume53
Issue number4
DOIs
Publication statusPublished - 2017

Bibliographical note

Funding Information:
The work is primarily supported by the U.S. Department of Energy Office of Basic Energy Sciences, Division of Materials Science and Engineering, under Award DE-SC0002158 for NC synthesis and for the fabrication, measurement, and chemical, electronic and optoelectronic analysis of NC thin films and their FETs, photoconductors, and solar cells. We thank the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2016R1C1B2006534) for optical and structural analysis of NCs. DBS acknowledges a National Science Foundation Graduate Research Fellowship under Award DGE-1321851.

Publisher Copyright:
© The Royal Society of Chemistry.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • Catalysis
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • General Chemistry
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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