Impact of the growth conditions of colloidal PbS nanocrystals on photovoltaic device performance

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DOIResolve DOI: http://doi.org/10.1021/cm200051j
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TypeArticle
Journal titleChemistry of Materials
Volume23
Issue7
Pages18051810; # of pages: 6
SubjectPbS nanocrystals; photovoltaic devices; nanocrystal growth rate; transient photocurrent measurement
AbstractHere, we present a detailed investigation on the influence of the growth conditions of colloidal lead sulfide (PbS) nanocrystals on photovoltaic device performance. The PbS nanocrystals were synthesized in a noncoordinating solvent, 1-octadecene, using oleic acid (OA) as the ligand. It was found that both the feeding molar ratio of OA to Pb and the reactant concentration were critical for controlling the growth rate of nanocrystals. Transient photocurrent (TPC) measurements revealed reduced trap density in thin films using the slow-growth nanocrystals. Solar cells based on the slow-growth nanocrystals showed a high power conversion efficiency (PCE) of 3.8% under simulated Air Mass 1.5 Global (AM 1.5G) irradiation (100 mW/cm2), a 2-fold increase in PCE, compared to the fast-growth nanocrystals, because of the remarkable improvement in the open-circuit voltage and fill factor in the PV devices.
Publication date
LanguageEnglish
AffiliationNRC Institute for Microstructural Sciences; NRC Steacie Institute for Molecular Sciences; National Research Council Canada
Peer reviewedYes
NPARC number19739628
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Record identifiera2efc3d9-b0cb-44f2-ad4c-e510c1c5f387
Record created2012-04-02
Record modified2016-05-09
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