Achieving Exciton Delocalization in Quantum Dot Aggregates Using Organic Linker Molecules

Eyal Cohen, Itay Gdor, Elisabet Romero, Shira Yochelis, Rienk van Grondelle, Yossi Paltiel

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The design of new complex structures containing semiconductor quantum dots offers a means to create a variety of new meso-solids and molecules. The control of the coupling properties between the dots, accompanied by the energetic tunability of the dots themselves, paves the way toward the application and use of novel quantum properties. Here we present our approach to alteration of interdot coupling using organic linking molecules in a system of covalently bonded, aggregated quantum dots. We used ultrafast transient absorption measurements to identify marks of exciton delocalization over nearest neighbors to some extent. In linking molecules incorporating a benzene ring, the delocalized electron cloud displayed a profound influence over the interdot effects, leading the way to easy coupling control in quantum-based devices, under ambient conditions.
Original languageEnglish
Pages (from-to)1014-1018
JournalJournal of Physical Chemistry Letters
Volume8
Issue number5
DOIs
Publication statusPublished - 2 Mar 2017

Cite this

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title = "Achieving Exciton Delocalization in Quantum Dot Aggregates Using Organic Linker Molecules",
abstract = "The design of new complex structures containing semiconductor quantum dots offers a means to create a variety of new meso-solids and molecules. The control of the coupling properties between the dots, accompanied by the energetic tunability of the dots themselves, paves the way toward the application and use of novel quantum properties. Here we present our approach to alteration of interdot coupling using organic linking molecules in a system of covalently bonded, aggregated quantum dots. We used ultrafast transient absorption measurements to identify marks of exciton delocalization over nearest neighbors to some extent. In linking molecules incorporating a benzene ring, the delocalized electron cloud displayed a profound influence over the interdot effects, leading the way to easy coupling control in quantum-based devices, under ambient conditions.",
author = "Eyal Cohen and Itay Gdor and Elisabet Romero and Shira Yochelis and {van Grondelle}, Rienk and Yossi Paltiel",
year = "2017",
month = "3",
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language = "English",
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publisher = "American Chemical Society",
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Achieving Exciton Delocalization in Quantum Dot Aggregates Using Organic Linker Molecules. / Cohen, Eyal; Gdor, Itay; Romero, Elisabet; Yochelis, Shira; van Grondelle, Rienk; Paltiel, Yossi.

In: Journal of Physical Chemistry Letters, Vol. 8, No. 5, 02.03.2017, p. 1014-1018.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - Achieving Exciton Delocalization in Quantum Dot Aggregates Using Organic Linker Molecules

AU - Cohen, Eyal

AU - Gdor, Itay

AU - Romero, Elisabet

AU - Yochelis, Shira

AU - van Grondelle, Rienk

AU - Paltiel, Yossi

PY - 2017/3/2

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AB - The design of new complex structures containing semiconductor quantum dots offers a means to create a variety of new meso-solids and molecules. The control of the coupling properties between the dots, accompanied by the energetic tunability of the dots themselves, paves the way toward the application and use of novel quantum properties. Here we present our approach to alteration of interdot coupling using organic linking molecules in a system of covalently bonded, aggregated quantum dots. We used ultrafast transient absorption measurements to identify marks of exciton delocalization over nearest neighbors to some extent. In linking molecules incorporating a benzene ring, the delocalized electron cloud displayed a profound influence over the interdot effects, leading the way to easy coupling control in quantum-based devices, under ambient conditions.

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