Print Email Facebook Twitter Developing Lattice Matched ZnMgSe Shells on InZnP Quantum Dots for Phosphor Applications Title Developing Lattice Matched ZnMgSe Shells on InZnP Quantum Dots for Phosphor Applications Author Mulder, J.T. (TU Delft ChemE/Opto-electronic Materials) Kirkwood, N.R.M. (TU Delft ChemE/Opto-electronic Materials) De Trizio, Luca (Istituto Italiano di Tecnologia) Li, Chen (Universiteit Antwerpen) Bals, Sara (Universiteit Antwerpen) Manna, L. (Istituto Italiano di Tecnologia) Houtepen, A.J. (TU Delft ChemE/Opto-electronic Materials) Date 2020 Abstract Indium phosphide quantum dots (QDs) have drawn attention as alternatives to cadmium- and lead-based QDs that are currently used as phosphors in lamps and displays. The main drawbacks of InP QDs are, in general, a lower photoluminescence quantum yield (PLQY), a decreased color purity, and poor chemical stability. In this research, we attempted to increase the PLQY and stability of indium phosphide QDs by developing lattice matched InP/MgSe core-shell nanoheterostructures. The choice of MgSe comes from the fact that, in theory, it has a near-perfect lattice match with InP, provided MgSe is grown in the zinc blende crystal structure, which can be achieved by alloying with zinc. To retain lattice matching, we used Zn in both the core and shell and we fabricated InZnP/ZnxMg1-xSe core/shell QDs. To identify the most suitable conditions for the shell growth, we first developed a synthesis route to ZnxMg1-xSe nanocrystals (NCs) wherein Mg is effectively incorporated. Our optimized procedure was employed for the successful growth of ZnxMg1-xSe shells around In(Zn)P QDs. The corresponding core/shell systems exhibit PLQYs higher than those of the starting In(Zn)P QDs and, more importantly, a higher color purity upon increasing the Mg content. The results are discussed in the context of a reduced density of interface states upon using better lattice matched ZnxMg1-xSe shells. Subject core-shellInPlattice matchingMgSephosphorquantum dots To reference this document use: http://resolver.tudelft.nl/uuid:bdf6285f-0b26-4e23-804f-0c3a91a0e2a1 DOI https://doi.org/10.1021/acsanm.0c00583 ISSN 2574-0970 Source ACS Applied Nano Materials, 3 (4), 3859-3867 Part of collection Institutional Repository Document type journal article Rights © 2020 J.T. Mulder, N.R.M. Kirkwood, Luca De Trizio, Chen Li, Sara Bals, L. Manna, A.J. Houtepen Files PDF acsanm.0c00583.pdf 9.5 MB Close viewer /islandora/object/uuid:bdf6285f-0b26-4e23-804f-0c3a91a0e2a1/datastream/OBJ/view