Size and Energy Level Tuning of Quantum Dot Solids via a Hybrid Ligand Complex.

Autor: Böhm ML; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Jellicoe TC; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Rivett JP; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Sadhanala A; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Davis NJ; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Morgenstern FS; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Gödel KC; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Govindasamy J; Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom., Benson CG; Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, United Kingdom., Greenham NC; Cavendish Laboratory, University of Cambridge , J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom., Ehrler B; Center for Nanophotonics, FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
Jazyk: angličtina
Zdroj: The journal of physical chemistry letters [J Phys Chem Lett] 2015 Sep 03; Vol. 6 (17), pp. 3510-4. Date of Electronic Publication: 2015 Aug 25.
DOI: 10.1021/acs.jpclett.5b01751
Abstrakt: The performance of quantum dots (QDs) in optoelectronic devices suffers as a result of sub-bandgap states induced by the large fraction of atoms on the surface of QDs. Recent progress in passivating these surface states with thiol ligands and halide ions has led to competitive efficiencies. Here, we apply a hybrid ligand mixture to passivate PbSe QD sub-bandgap tail states via a low-temperature, solid-state ligand exchange. We show that this ligand mixture allows tuning of the energy levels and the physical QD size in the solid state during film formation. We hereby present a novel, postsynthetic path to tune the properties of QD films.
Databáze: MEDLINE
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