Identifying and Eliminating Emissive Sub-bandgap States in Thin Films of PbS Nanocrystals

Identifying and Eliminating Emissive Sub-bandgap States in Thin Films of PbS Nanocrystals

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 27(2015), 30 vom: 15. Aug., Seite 4481-4486
1. Verfasser: Hwang, Gyu Weon (VerfasserIn)
Weitere Verfasser: Kim, Donghun, Cordero, Jose M, Wilson, Mark W B, Chuang, Chia-Hao M, Grossman, Jeffrey C, Bawendi, Moungi G
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article lead sulfide origin of trap states quantum dots sub-bandgap emission trap density
Beschreibung
Zusammenfassung:© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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 spectro-scopy measurements and density function theory simulations demonstrate that they are associated with under-charged Pb
Beschreibung:Date Revised 01.10.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201501156