title: Mn(2+)-Doped CdSe/CdS Core/Multishell Colloidal Quantum Wells Enabling Tunable Carrier-Dopant Exchange Interactions.
abstract: In this work, we report the manifestations of carrier-dopant exchange interactions in colloidal Mn(2+)-doped CdSe/CdS core/multishell quantum wells. The carrier-magnetic ion exchange interaction effects are tunable through wave function engineering. In our quantum well heterostructures, manganese was incorporated by growing a Cd0.985Mn0.015S monolayer shell on undoped CdSe nanoplatelets using the colloidal atomic layer deposition technique. Unlike previously synthesized Mn(2+)-doped colloidal nanostructures, the location of the Mn ions was controlled with atomic layer precision in our heterostructures. This is realized by controlling the spatial overlap between the carrier wave functions with the manganese ions by adjusting the location, composition, and number of the CdSe, Cd1-xMnxS, and CdS layers. The photoluminescence quantum yield of our magnetic heterostructures was found to be as high as 20% at room temperature with a narrow photoluminescence bandwidth of ∼22 nm. Our colloidal quantum wells, which exhibit magneto-optical properties analogous to those of epitaxially grown quantum wells, offer new opportunities for solution-processed spin-based semiconductor devices.
authors.affiliation: Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University , Ankara 06800, Turkey.
authors.forename: Savas
authors.initials: S
authors.lastname: Delikanli
authors.affiliation: Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University , Ankara 06800, Turkey.
authors.forename: Mehmet Zafer
authors.initials: MZ
authors.lastname: Akgul
authors.affiliation: Department of Physics, SUNY at Buffalo , Amherst, New York 14260, United States.
authors.forename: Joseph R
authors.initials: JR
authors.lastname: Murphy
authors.affiliation: Department of Physics, SUNY at Buffalo , Amherst, New York 14260, United States.
authors.forename: Biplob
authors.initials: B
authors.lastname: Barman
authors.affiliation: Department of Physics, SUNY at Buffalo , Amherst, New York 14260, United States.
authors.forename: Yutsung
authors.initials: Y
authors.lastname: Tsai
authors.affiliation: Department of Physics, SUNY at Buffalo , Amherst, New York 14260, United States.
authors.forename: Thomas
authors.initials: T
authors.lastname: Scrace
authors.affiliation: Department of Physics, SUNY at Buffalo , Amherst, New York 14260, United States.
authors.forename: Peiyao
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University , Ankara 06800, Turkey.
authors.forename: Berkay
authors.initials: B
authors.lastname: Bozok
authors.affiliation: LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Materials Sciences, Nanyang Technological University , Singapore 639798.
authors.forename: Pedro Ludwig
authors.initials: PL
authors.lastname: Hernández-Martínez
authors.affiliation: Naval Research Laboratory , Washington, DC 20375, United States.
authors.forename: Joseph
authors.initials: J
authors.lastname: Christodoulides
authors.affiliation: Department of Physics, SUNY at Buffalo , Amherst, New York 14260, United States.
authors.forename: Alexander N
authors.initials: AN
authors.lastname: Cartwright
authors.affiliation: Department of Physics, SUNY at Buffalo , Amherst, New York 14260, United States.
authors.forename: Athos
authors.initials: A
authors.lastname: Petrou
authors.affiliation: Department of Electrical and Electronics Engineering, Department of Physics, UNAM - Institute of Materials Science and Nanotechnology, Bilkent University , Ankara 06800, Turkey.|LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Materials Sciences, Nanyang Technological University , Singapore 639798.
authors.forename: Hilmi Volkan
authors.initials: HV
authors.lastname: Demir
keywords: core/shell; diluted magnetic semiconductors; nanoplatelets; photoluminescence; sp−d exchange interaction