Enhanced thermopower in PbSe nanocrystal quantum dot superlattices

Robert Y. Wang, Joseph P. Feser, Jong Soo Lee, Dmitri V. Talapin, Rachel Segalman, Arun Majumdar

Research output: Contribution to journalArticle

212 Scopus citations

Abstract

We examine the effect of strong three-dimensional quantum confinement on the thermopower and electrical conductivity of PbSe nanocrystal superlattices. We show that for comparable carrier concentrations PbSe nanocrystal superlattices exhibit a substantial thermopower enhancement of several hundred microvolts per Kelvin relative to bulk PbSe. We also find that thermopower increases monotonically as the nanocrystal size decreases due to changes in carrier concentration. Lastly, we demonstrate that thermopower of PbSe nanocrystal solids can be tailored by charge-transfer doping.

Original languageEnglish (US)
Pages (from-to)2283-2288
Number of pages6
JournalNano Letters
Volume8
Issue number8
DOIs
StatePublished - Aug 1 2008
Externally publishedYes

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ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Wang, R. Y., Feser, J. P., Lee, J. S., Talapin, D. V., Segalman, R., & Majumdar, A. (2008). Enhanced thermopower in PbSe nanocrystal quantum dot superlattices. Nano Letters, 8(8), 2283-2288. https://doi.org/10.1021/nl8009704