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Zhang, Heyou ; Dharpure, Pankaj ; Ashokan, Arun ; Gießübel, Max ; Mulvaney, Paul ; Thelakkat, Mukundan ; Köhler, Jürgen:
Modulation of Semiconductor Quantum Dot Photoluminescence by Photochromic Molecules.
In: Nano Letters.
Bd. 26
(2026)
Heft 9
.
- S. 3156-3163.
ISSN 1530-6992
DOI: https://doi.org/10.1021/acs.nanolett.5c06282
Angaben zu Projekten
| Projekttitel: |
Offizieller Projekttitel Projekt-ID GRK 2818: Optische Anregungen in organischen und anorganischen Halbleitern: Verstehen und Kontrollieren durch externe Stimuli 464648186 Solar Technologies go Hybrid (SolTech) Ohne Angabe |
|---|---|
| Projektfinanzierung: |
Deutsche Forschungsgemeinschaft Bavarian State Ministry for Arts and Science |
Abstract
A hybrid system comprising semiconductor quantum dots (QDs) ligated with photochromic molecules has been synthesized and used to study the photomodulation of QD luminescence. The system has been constructed in such a way that the excited-state energies of the QDs and the molecules match but only for one of the conformations of the chromophore, thus enabling phototunable energy transfer from the QD to the ligands. Furthermore, the hybrid system can be immobilized in thin polymer films, creating a solid-state optical switching device. It is demonstrated that the switching of QD photoluminescence between the high-emissive and quenched states occurs on a time scale of tens of milliseconds and in some cases takes even less than 10 ms. The red–green–blue color space can be covered by using three different types of QDs while employing only a single type of photochromic molecule.