title: Exploiting the colloidal nanocrystal library to construct electronic devices.
abstract: Synthetic methods produce libraries of colloidal nanocrystals with tunable physical properties by tailoring the nanocrystal size, shape, and composition. Here, we exploit colloidal nanocrystal diversity and design the materials, interfaces, and processes to construct all-nanocrystal electronic devices using solution-based processes. Metallic silver and semiconducting cadmium selenide nanocrystals are deposited to form high-conductivity and high-mobility thin-film electrodes and channel layers of field-effect transistors. Insulating aluminum oxide nanocrystals are assembled layer by layer with polyelectrolytes to form high-dielectric constant gate insulator layers for low-voltage device operation. Metallic indium nanocrystals are codispersed with silver nanocrystals to integrate an indium supply in the deposited electrodes that serves to passivate and dope the cadmium selenide nanocrystal channel layer. We fabricate all-nanocrystal field-effect transistors on flexible plastics with electron mobilities of 21.7 square centimeters per volt-second.
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA. Complex Assemblies of Soft Matter, CNRS-SOLVAY-PENN UMI 3254, Bristol, PA 19007-3624, USA. Rare Metals Research Center, Korea Institute of Geoscience and Mineral Resources, 124 Gwahang-no, Yuseong-Gu, Daejeon, 305-350, Korea.
authors.forename: Ji-Hyuk
authors.initials: JH
authors.lastname: Choi
authors.affiliation: Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Han
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA. Department of Materials Science and Engineering, Korea University, Seoul 136-713, Korea.
authors.forename: Soong Ju
authors.initials: SJ
authors.lastname: Oh
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Taejong
authors.initials: T
authors.lastname: Paik
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA. Complex Assemblies of Soft Matter, CNRS-SOLVAY-PENN UMI 3254, Bristol, PA 19007-3624, USA.
authors.forename: Pil
authors.initials: P
authors.lastname: Sung
authors.affiliation: Department of Materials Science and Engineering, Yonsei University, Seoul 120-747, Korea.
authors.forename: Jinwoo
authors.initials: J
authors.lastname: Sung
authors.affiliation: Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Xingchen
authors.initials: X
authors.lastname: Ye
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Tianshuo
authors.initials: T
authors.lastname: Zhao
authors.affiliation: Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Benjamin T
authors.initials: BT
authors.lastname: Diroll
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA. Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Murray
authors.affiliation: Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA. Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA. Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA. kagan@seas.upenn.edu.
authors.forename: Cherie R
authors.initials: CR
authors.lastname: Kagan