title: Engineering charge injection and charge transport for high performance PbSe nanocrystal thin film devices and circuits.
abstract: We study charge injection and transport in PbSe nanocrystal thin films. By engineering the contact metallurgy and nanocrystal ligand exchange chemistry and surface passivation, we demonstrate partial Fermi-level pinning at the metal-nanocrystal interface and an insulator-to-metal transition with increased coupling and doping, allowing us to design high conductivity and mobility PbSe nanocrystal films. We construct complementary nanocrystal circuits from n-type and p-type transistors realized from a single nanocrystal material by selecting the contact metallurgy.
authors.affiliation: Department of Materials Science and Engineering, ‡Department of Electrical and Systems Engineering, and §Department of Chemistry, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Soong Ju
authors.initials: SJ
authors.lastname: Oh
authors.forename: Zhuqing
authors.initials: Z
authors.lastname: Wang
authors.forename: Nathaniel E
authors.initials: NE
authors.lastname: Berry
authors.forename: Ji-Hyuk
authors.initials: JH
authors.lastname: Choi
authors.forename: Tianshuo
authors.initials: T
authors.lastname: Zhao
authors.forename: E Ashley
authors.initials: EA
authors.lastname: Gaulding
authors.forename: Taejong
authors.initials: T
authors.lastname: Paik
authors.forename: Yuming
authors.initials: Y
authors.lastname: Lai
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Murray
authors.forename: Cherie R
authors.initials: CR
authors.lastname: Kagan
keywords: PbSe; bandlike transport; charge injection; charge transport; circuit; field-effect transistor