Title: Efficient and robust host-guest antenna composite for light harvesting
Authors : Devaux, André
Calzaferri, Gion
Belser, Peter
Cao, Pengpeng
Brühwiler, Dominik
Kunzmann, Andreas
Published in : Chemistry of Materials
Volume(Issue) : 26
Issue : 23
Pages : 6878
Pages to: 6885
Publisher / Ed. Institution : American Chemical Society
Issue Date: 2014
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : ZeoFRET; Light management; Zeolite
Subject (DDC) : 540: Chemistry
Abstract: We report discovery of a new efficient and robust antenna composite for light harvesting. The organic dye hostasol red (HR) is strongly luminescent in aprotic solvents but only weakly luminescent in potassium zeolite L (ZL) at ambient conditions. We observed a dramatic increase of the luminescence quantum yield of HR-ZL composites if some or all exchangeable potassium cations of ZL are substituted by an organic imidazolium cation (IMZ+) and if the acceptor HR is embedded in the middle part of the channels, so that it is fully protected by the environment of the perylene dye tb-DXP. This led to the discovery of a highly efficient donor,acceptor-ZL antenna material where tb-DXP acts as donor and HR acts as acceptor. The material has a donor-to-acceptor (D/A) absorption ratio of more than 100:1 and a nearly quantitative FRET efficiency. Synthesis of this host-guest material is reported. We describe a successful procedure for achieving full sealing of the ZL channel entrances such that the guests cannot escape. This new material is of great interest for applications in luminescent solar concentrator (LSC) devices because the efficiency killing self-absorption is very low.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1021/cm503761q
ISSN: 0897-4756
URI: https://digitalcollection.zhaw.ch/handle/11475/2611
Published as part of the ZHAW project : Langzeitstabilität von eingebetteten ZeoFRET-Komposita
Appears in Collections:Publikationen Life Sciences und Facility Management

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