title: N-type colloidal-quantum-dot solids for photovoltaics.
abstract: N-type PbS colloidal-quantum-dot (CQD) films are fabricated using a controlled halide chemical treatment, applied in an inert processing ambient environment. The new materials exhibit a mobility of 0.1 cm(2)  V(-1)  s(-1) . The halogen ions serve both as a passivating agent and n-dope the films via substitution at surface chalcogen sites. The majority electron concentration across the range 10(16)  to 10(18)  cm(-3)  is varied systematically.
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
authors.forename: David
authors.initials: D
authors.lastname: Zhitomirsky
authors.forename: Melissa
authors.initials: M
authors.lastname: Furukawa
authors.forename: Jiang
authors.initials: J
authors.lastname: Tang
authors.forename: Philipp
authors.initials: P
authors.lastname: Stadler
authors.forename: Sjoerd
authors.initials: S
authors.lastname: Hoogland
authors.forename: Oleksandr
authors.initials: O
authors.lastname: Voznyy
authors.forename: Huan
authors.initials: H
authors.lastname: Liu
authors.forename: Edward H
authors.initials: EH
authors.lastname: Sargent
mesh_terms: D018011:Chalcogens / Q000737:chemistry; D003102:Colloids / Q000737:chemistry*; D004566:Electrodes; D006219:Halogens / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D007854:Lead / Q000737:chemistry; D045663:Quantum Dots; D012666:Semiconductors; D012993:Solar Energy; D013440:Sulfides / Q000737:chemistry; D013499:Surface Properties
chemical_list: D018011:Chalcogens; D003102:Colloids; D006219:Halogens; D007477:Ions; D013440:Sulfides; C018391:lead sulfide; D007854:Lead