Enhanced thermopower in PbSe nanocrystal quantum dot superlattices

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

doi:10.1021/nl8009704

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 journal › Article › peer-review

245 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 language	English (US)
Pages (from-to)	2283-2288
Number of pages	6
Journal	Nano Letters
Volume	8
Issue number	8
DOIs	https://doi.org/10.1021/nl8009704
State	Published - Aug 2008
Externally published	Yes

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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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.",

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AU - Feser, Joseph P.

AU - Lee, Jong Soo

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AU - Segalman, Rachel

AU - Majumdar, Arun

PY - 2008/8

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AB - 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.

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Enhanced thermopower in PbSe nanocrystal quantum dot superlattices

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