title: Enhanced thermopower in PbSe nanocrystal quantum dot superlattices.
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.
authors.affiliation: Department of Mechanical Engineering, University of California, Berkeley, California 94720, USA.
authors.forename: Robert Y
authors.initials: RY
authors.lastname: Wang
authors.forename: Joseph P
authors.initials: JP
authors.lastname: Feser
authors.forename: Jong-Soo
authors.initials: JS
authors.lastname: Lee
authors.forename: Dmitri V
authors.initials: DV
authors.lastname: Talapin
authors.forename: Rachel
authors.initials: R
authors.lastname: Segalman
authors.forename: Arun
authors.initials: A
authors.lastname: Majumdar