Identifying and Eliminating Emissive Sub-bandgap States in Thin Films of PbS Nanocrystals
DownloadGrossman_Identifying and eliminating.pdf (1.221Mb)
OPEN_ACCESS_POLICY
Open Access Policy
Creative Commons Attribution-Noncommercial-Share Alike
Terms of use
Metadata
Show full item recordAbstract
Chemical oxidation of under-charged Pb atoms reduces the density of trap states by a factor of 40 in films of colloidal PbS quantum dots for devices. These emissive sub-bandgap states are a byproduct of several standard ligand-exchange procedures. X-ray photoelectron spectroscopy measurements and density function theory simulations demonstrate that they are associated with under-charged Pb.
Date issued
2015-07Department
Massachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Research Laboratory of ElectronicsJournal
Advanced Materials
Publisher
Wiley-Blackwell
Citation
Hwang, Gyu Weon et al. "Identifying and Eliminating Emissive Sub-bandgap States in Thin Films of PbS Nanocrystals." Advanced Materials 27, 30 (July 2015): 4481–4486 © 2015 WILEY-VCH Verlag GmbH & Co.
Version: Author's final manuscript
ISSN
0935-9648
1521-4095