Work

Electronic Impurity Doping in CdSe Nanocrystals

Year: 2012

Type: article

Abstract: We dope CdSe nanocrystals with Ag impurities and investigate their optical and electrical properties. Doping leads not only to dramatic changes but surprising complexity. The addition of just a few Ag atoms per nanocrystal causes a large enhancement in the fluorescence, reaching efficiencies comparable to core-shell nanocrystals. While Ag was expected to be a substitutional acceptor, nonmonotonic trends in the fluorescence and Fermi level suggest that Ag changes from an interstitial (n-type) to a substitutional (p-type) impurity with increased doping.

Source: Nano Letters

DOI: 10.1021/nl300880g

Authors: Ayaskanta Sahu, Moon Sung Kang, Alexander Kompch, Christian Notthoff, Andrew W. Wills, Donna Deng, Markus Winterer, C. Daniel Frisbie, David J. Norris

Institutions: University of Minnesota, ETH Zurich, Soongsil University, University of Duisburg-Essen

Language: English

Topic: Quantum Dots Synthesis And Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, University of Minnesota, Deutsche Forschungsgemeinschaft, Materials Research Science and Engineering Center, Harvard University, Deutsches Elektronen-Synchrotron, Division of Materials Research

Awards: G1244231298, G1743521041, G1773918723, G19821533, University of Minnesota Materials Research Science and Engineering Center, G4060427793, Materials World Network: Electronic Doping in Semiconductor Nanocrystals, G6456560397

OpenAlex ID: W2025675818

FWCI: 13.82

Cites: 58

Cited by: 378

Related to: 10