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.
authors.affiliation: Department of Applied Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel.
authors.forename: Eyal
authors.identifier: http://orcid.org/0000-0003-0457-9200
authors.initials: E
authors.lastname: Cohen
authors.affiliation: Institute of Chemistry, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel.
authors.forename: Itay
authors.identifier: http://orcid.org/0000-0002-5900-6082
authors.initials: I
authors.lastname: Gdor
authors.affiliation: Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam , De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors.forename: Elisabet
authors.initials: E
authors.lastname: Romero
authors.affiliation: Department of Applied Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel.
authors.forename: Shira
authors.initials: S
authors.lastname: Yochelis
authors.affiliation: Department of Physics and Astronomy, Faculty of Sciences, VU University Amsterdam , De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors.forename: Rienk
authors.initials: R
authors.lastname: van Grondelle
authors.affiliation: Department of Applied Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel.
authors.forename: Yossi
authors.initials: Y
authors.lastname: Paltiel