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Son, Jae Sung
Nanomaterials Science and Engineering Lab (NSE)
Research Interests
  • Nanoparticle, 3D printing, Thermoelectrics, Electronics

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Temperature-Dependent Hall and Field-Effect Mobility in Strongly Coupled All-Inorganic Nanocrystal Arrays

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Title
Temperature-Dependent Hall and Field-Effect Mobility in Strongly Coupled All-Inorganic Nanocrystal Arrays
Author
Jang, JaeyoungLiu, WenyongSon, Jae SungTalapin, Dmitri V.
Keywords
carrier trapping; charge transport; doping; electron mobility; Hall effect; InAs nanocrystals; inorganic ligands
Issue Date
2014-02
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.14, no.2, pp.653 - 662
Abstract
We report on the temperature-dependent Hall effect characteristics of nanocrystal (NC) arrays prepared from colloidal InAs NCs capped with metal chalcogenide complex (MCC) ligands (In2Se4 2- and Cu7S4 -). Our study demonstrates that Hall effect measurements are a powerful way of exploring the fundamental properties of NC solids. We found that solution-cast 5.3 nm InAs NC films capped with copper sulfide MCC ligands exhibited high Hall mobility values over 16 cm 2/(V s). We also showed that the nature of MCC ligands can control doping in NC solids. The comparative study of the temperature-dependent Hall and field-effect mobility values provides valuable insights concerning the charge transport mechanism and points to the transition from a weak to a strong coupling regime in all-inorganic InAs NC solids.
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DOI
10.1021/nl403889u
ISSN
1530-6984
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MSE_Journal Papers
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