Universität zu Köln

Liess, Andreas, Arjona-Esteban, Alhama, Kudzus, Astrid, Albert, Julius, Krause, Ana-Maria, Lv, Aifeng, Stolte, Matthias, Meerholz, Klaus ORCID: 0000-0001-7450-4672 and Wuerthner, Frank (2019). Ultranarrow Bandwidth Organic Photodiodes by Exchange Narrowing in Merocyanine H- and J-Aggregate Excitonic Systems. Adv. Funct. Mater., 29 (21). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1616-3028

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Abstract

Ultranarrowband organic photodiodes (OPDs) are demonstrated for thin film solid state materials composed of tightly packed dipolar merocyanine dyes. For these dyes the packing arrangement can be controlled by the bulkiness of the donor substituent, leading to either strong H- or strong J-type exciton coupling in the interesting blue (H-aggregate) and NIR (J-aggregate) spectral ranges. Both bands are shown to arise from one single exciton band according to fluorescence measurements and are not just a mere consequence of different polymorphs within the same thin film. By fabrication of organic thin-film transistors, these dyes are demonstrated to exhibit hole transport behavior in spin-coated thin films. Moreover, when used as organic photodiodes in planar heterojunctions with C-60 fullerene, they show wavelength-selective photocurrents in the solid state with maximum external quantum efficiencies of up to 11% and ultranarrow bandwidths down to 30 nm. Thereby, narrowing the linewidths of optoelectronic functional materials by exciton coupling provides a powerful approach to produce ultranarrowband organic photodiodes.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Liess, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Arjona-Esteban, Alhama UNSPECIFIED UNSPECIFIED UNSPECIFIED Kudzus, Astrid UNSPECIFIED UNSPECIFIED UNSPECIFIED Albert, Julius UNSPECIFIED UNSPECIFIED UNSPECIFIED Krause, Ana-Maria UNSPECIFIED UNSPECIFIED UNSPECIFIED Lv, Aifeng UNSPECIFIED UNSPECIFIED UNSPECIFIED Stolte, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerholz, Klaus UNSPECIFIED orcid.org/0000-0001-7450-4672 UNSPECIFIED Wuerthner, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-148875
DOI:	10.1002/adfm.201805058
Journal or Publication Title:	Adv. Funct. Mater.
Volume:	29
Number:	21
Date:	2019
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1616-3028
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Physical Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SOLID-STATE; THIN-FILMS; DYES; FLUORESCENCE; PACKING; TRANSISTORS; PERFORMANCE; MOLECULES; DISCOVERY; SWITCHES Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14887