Print Email Facebook Twitter Room-Temperature Electron Transport in Self-Assembled Sheets of PbSe Nanocrystals with a Honeycomb Nanogeometry Title Room-Temperature Electron Transport in Self-Assembled Sheets of PbSe Nanocrystals with a Honeycomb Nanogeometry Author Alimoradi Jazi, M. (Debye Institute) Kulkarni, A. (TU Delft ChemE/Opto-electronic Materials) Sinai, Sophia Buhbut (Debye Institute) Peters, Joep L. (Debye Institute) Geschiere, Eva (External organisation) Failla, M. (TU Delft ChemE/Opto-electronic Materials) Delerue, Christophe (IEMN Institut d'Electronique de Microelectronique et de Nanotechnologie) Houtepen, A.J. (TU Delft ChemE/Opto-electronic Materials) Siebbeles, L.D.A. (TU Delft ChemE/Opto-electronic Materials) Vanmaekelbergh, Daniel (Debye Institute) Date 2019 Abstract It has been shown recently that atomically coherent superstructures of a nanocrystal monolayer in thickness can be prepared by self-assembly of monodisperse PbSe nanocrystals, followed by oriented attachment. Superstructures with a honeycomb nanogeometry are of special interest, as theory has shown that they are regular 2-D semiconductors, but with the highest valence and lowest conduction bands being Dirac-type, that is, with a linear energy-momentum relation around the K-points in the zone. Experimental validation will require cryogenic measurements on single sheets of these nanocrystal monolayer superstructures. Here, we show that we can incorporate these fragile superstructures into a transistor device with electrolyte gating, control the electron density, and measure the electron transport characteristics at room temperature. The electron mobility is 1.5 ± 0.5 cm2 V-1 s-1, similar to the mobility observed with terahertz spectroscopy on freestanding superstructures. The terahertz spectroscopic data point to pronounced carrier scattering on crystallographic imperfections in the superstructure, explaining the limited mobility. To reference this document use: http://resolver.tudelft.nl/uuid:af996004-facc-4ec5-baad-e70524dd57d4 DOI https://doi.org/10.1021/acs.jpcc.9b03549 ISSN 1932-7447 Source The Journal of Physical Chemistry C, 123 (22), 14058-14066 Part of collection Institutional Repository Document type journal article Rights © 2019 M. Alimoradi Jazi, A. Kulkarni, Sophia Buhbut Sinai, Joep L. Peters, Eva Geschiere, M. Failla, Christophe Delerue, A.J. Houtepen, L.D.A. Siebbeles, Daniel Vanmaekelbergh Files PDF acs.jpcc.9b03549.pdf 3.21 MB Close viewer /islandora/object/uuid:af996004-facc-4ec5-baad-e70524dd57d4/datastream/OBJ/view