title: Doping control via molecularly engineered surface ligand coordination.
abstract: A means to control the net doping of a CQD solid is identified via the design of the bidentate ligand crosslinking the material. The strategy does not rely on implementing different atmospheres at different steps in device processing, but instead is a robust strategy implemented in a single processing ambient. We achieve an order of magnitude difference in doping that allows us to build a graded photovoltaic device and maintain high current and voltage at maximum power-point conditions.
authors.affiliation: Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
authors.forename: Mingjian
authors.initials: M
authors.lastname: Yuan
authors.forename: David
authors.initials: D
authors.lastname: Zhitomirsky
authors.forename: Valerio
authors.initials: V
authors.lastname: Adinolfi
authors.forename: Oleksandr
authors.initials: O
authors.lastname: Voznyy
authors.forename: Kyle W
authors.initials: KW
authors.lastname: Kemp
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Ning
authors.forename: Xinzheng
authors.initials: X
authors.lastname: Lan
authors.forename: Jixian
authors.initials: J
authors.lastname: Xu
authors.forename: Jin Young
authors.initials: JY
authors.lastname: Kim
authors.forename: Haopeng
authors.initials: H
authors.lastname: Dong
authors.forename: Edward H
authors.initials: EH
authors.lastname: Sargent
keywords: colloidal quantum dots; depleted heterojunction; doping; photovoltaics; surface ligands