Ultrastable PbSe Nanocrystal Quantum Dots via in Situ Formation of Atomically Thin Halide Adlayers on PbSe(100)

Cited 91 time in webofscience Cited 0 time in scopus
  • Hit : 273
  • Download : 0
The fast degradation of lead selenide (PbSe) nanocrystal quantum dots (NQDs) in ambient conditions impedes widespread deployment of the highly excitonic, thus versatile, colloidal NQDs. Here we report a simple in situ post-synthetic halide salt treatment that results in size-independent air stability of PbSe NQDs without significantly altering their optoelectronic characteristics. From TEM, NMR, and XPS results and DFT calculations, we propose that the unprecedented size-independent air stability of the PbSe NQDs can be attributed to the successful passivation of under-coordinated PbSe(100) facets with atomically thin PbX2 (X = Cl, Br, I) adlayers. Conductive films made of halide-treated ultrastable PbSe NQDs exhibit markedly improved air stability and behave as an n-type channel in a field-effect transistor. Our simple in situ wet-chemical passivation scheme will enable broader utilization of PbSe NQDs in ambient conditions in many optoelectronic applications.
Publisher
AMER CHEMICAL SOC
Issue Date
2014-06
Language
English
Article Type
Article
Keywords

SOLAR-CELLS; SEMICONDUCTOR NANOCRYSTALS; ELECTRICAL-PROPERTIES; LIGAND-EXCHANGE; PASSIVATION; CHEMISTRY; EMISSION; SELENIDE; SOLIDS; BRIGHT

Citation

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.136, no.25, pp.8883 - 8886

ISSN
0002-7863
DOI
10.1021/ja503957r
URI
http://hdl.handle.net/10203/189987
Appears in Collection
NT-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 91 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0