title: InAs Colloidal Quantum Dots Synthesis via Aminopnictogen Precursor Chemistry.
abstract: Despite their various potential applications, InAs colloidal quantum dots have attracted considerably less attention than more classical II-VI materials because of their complex syntheses that require hazardous precursors. Recently, aminophosphine has been introduced as a cheap, easy-to-use and efficient phosphorus precursor to synthesize InP quantum dots. Here, we use aminopnictogen precursors to implement a similar approach for synthesizing InAs quantum dots. We develop a two-step method based on the combination of aminoarsine as the arsenic precursor and aminophosphine as the reducing agent. This results in state-of-the-art InAs quantum dots with respect to the size dispersion and band gap range. Moreover, we present shell coating procedures that lead to InAs/ZnS(e) core/shell quantum dots that emit in the infrared region. This innovative synthesis approach can greatly facilitate the research on InAs quantum dots and may lead to synthesis protocols for a wide range of III-V quantum dots.
authors.affiliation: Physics and Chemistry of Nanostructures, Ghent University , 9000 Ghent, Belgium.|Center for Nano and Biophotonics, Ghent University , 9000 Ghent, Belgium.
authors.forename: Valeriia
authors.initials: V
authors.lastname: Grigel
authors.affiliation: Physics and Chemistry of Nanostructures, Ghent University , 9000 Ghent, Belgium.|Center for Nano and Biophotonics, Ghent University , 9000 Ghent, Belgium.
authors.forename: Dorian
authors.initials: D
authors.lastname: Dupont
authors.affiliation: Physics and Chemistry of Nanostructures, Ghent University , 9000 Ghent, Belgium.|Center for Nano and Biophotonics, Ghent University , 9000 Ghent, Belgium.
authors.forename: Kim
authors.initials: K
authors.lastname: De Nolf
authors.affiliation: Physics and Chemistry of Nanostructures, Ghent University , 9000 Ghent, Belgium.|Center for Nano and Biophotonics, Ghent University , 9000 Ghent, Belgium.
authors.forename: Zeger
authors.initials: Z
authors.lastname: Hens
authors.affiliation: Physics and Chemistry of Nanostructures, Ghent University , 9000 Ghent, Belgium.|Center for Nano and Biophotonics, Ghent University , 9000 Ghent, Belgium.
authors.forename: Mickael D
authors.initials: MD
authors.lastname: Tessier