Please use this identifier to cite or link to this item: doi:10.22028/D291-30748
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Title: Kinetic Control over Self-Assembly of Semiconductor Nanoplatelets
Author(s): Momper, Rebecca
Zhang, Heng
Chen, Shuai
Halim, Henry
Johannes, Ewald
Yordanov, Stoyan
Braga, Daniele
Blülle, Balthasar
Doblas, David
Kraus, Tobias
Bonn, Mischa
Wang, Hai I.
Riedinger, Andreas
Language: English
Title: Nano letters : a journal dedicated to nanoscience and nanotechnology
Pages: 9
Publisher/Platform: ACS
Year of Publication: 2020
Publikation type: Journal Article
Abstract: Semiconductor nanoplatelets exhibit spectrally pure, directional fluorescence. To make polarized light emission accessible and the charge transport effective, nanoplatelets have to be collectively oriented in the solid state. We discovered that the collective nanoplatelets orientation in monolayers can be controlled kinetically by exploiting the solvent evaporation rate in self-assembly at liquid interfaces. Our method avoids insulating additives such as surfactants, making it ideally suited for optoelectronics. The monolayer films with controlled nanoplatelets orientation (edge-up or face-down) exhibit long-range ordering of transition dipole moments and macroscopically polarized light emission. Furthermore, we unveil that the substantial in-plane electronic coupling between nanoplatelets enables charge transport through a single nanoplatelets monolayer, with an efficiency that strongly depends on the orientation of the nanoplatelets. The ability to kinetically control the assembly of nanoplatelets into ordered monolayers with tunable optical and electronic properties paves the way for new applications in optoelectronic devices.
DOI of the first publication: 10.1021/acs.nanolett.9b05270
URL of the first publication:
Link to this record: hdl:20.500.11880/29047
ISSN: 1530-6984
Date of registration: 23-Apr-2020
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Chemie
Professorship: NT - Prof. Dr. Tobias Kraus
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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