Project

Back to overview

Structured Templates for Dye Aggregation and Crystallization for Applications in Photovoltaics and Photonics

English title Structured Templates for Dye Aggregation and Crystallization for Applications in Photovoltaics and Photonics
Applicant Heier Jakob
Number 149127
Funding scheme Project funding (Div. I-III)
Research institution Abteilung Funktionspolymere EMPA
Institution of higher education Swiss Federal Laboratories for Materials Science and Technology - EMPA
Main discipline Material Sciences
Start/End 01.11.2013 - 31.10.2014
Approved amount 60'740.00
Show all

All Disciplines (3)

Discipline
Material Sciences
Organic Chemistry
Microelectronics. Optoelectronics

Keywords (6)

Organic Solar Cell; Organic Thin Film; H-Aggregates; Organic Single Crystal; PCBM; Cyanine Dye

Lay Summary (German)

Lead
Ein Feld in der Wissenschaft welches sich rasant entwickelt ist die Anwendung löslicher organischer Halbleiter in elektronischen Bauteilen, wie Leuchtdioden, Solarzellen und Feldeffekt-Transistoren. Organische Materialien haben über Beschichtungsverfahren aus der Lösung das Potential zu hohem Durchsatz. Viele Eigenschaften organischer Moleküle kommen erst zur Geltung wenn die Moleküle in Aggregaten oder Kristallen angeordnet sind. Dies kann man über Selbst-Anordnungsprozesse erreichen.
Lay summary

In diesem Projekt untersuchen wir Aggregation und Kristallisation von Cyanin-Farbstoffen über „template assisted self-assembly“. Das erste Substrat besteht aus einer nanostrukturierten Fullerene-Oberfläche welche wir durch einen Phasenentmischungsvorgang herstellen. Ein weiteres Substrat besteht aus einem Muster hoch- und niederenergetischer Monolagen. Die räumliche Beschränkung erreicht man hier durch Entnetzungs-Phänomene. Die gleichzeitige Wirkung von räumlicher Eingrenzung und Kapillarkräften während der Verdampfung des Lösungsmittels führt zum Wachstum von Aggregaten und Kristallen. Ziel des Projektes ist es Verständnis und Kontrolle über die Aggregation von Cyanin-Farbstoffen in dünnen Filmen zu erhalten.  

Das Projekt erhofft sich wichtige Fortschritte im Bereich der Selbstorganisation organischer Farbstoffmoleküle. Diese Farbstoffsysteme weisen aussergewöhnliche optische und elektronische Eigenschaften auf welche von grossem Interesse für die organische Elektronik sind. Mögliche Anwendungen liegen im Bereich der Sensorik oder der erneuerbaren Energien. Damit trägt das Projekt zu einem nachhaltigen Resourcenmanagement bei.

Direct link to Lay Summary Last update: 09.10.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Diyne-Functionalized Fullerene Self Assembly for Thin Film Solid-State Polymerization
Jean-Nicolas Tisserant, Roland Hany, Eric Wimmer, Antoni Sanchez-Ferrer, Jozef Adamcik, Gaetan Wicht, Frank Nüesch, Daniel Rentsch, Andreas Borgschulte, Raffaele Mezzenga, Jakob Heier (2014), Diyne-Functionalized Fullerene Self Assembly for Thin Film Solid-State Polymerization, in Macromolecules, 47, 721-728.
Resonance Light Scattering in Dye-Aggregates Forming in Dewetting Droplets
Tisserant Jean-Nicolas, Brönnimann Rolf, Hany Roland, Jenatsch Sandra, Nüesch Frank A., Mezzenga Raffaele, Bona Gina-Luca, Heier Jakob (2014), Resonance Light Scattering in Dye-Aggregates Forming in Dewetting Droplets, in ACS Nano, 8(10), 10057-10065.

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
MRS Spring Meeting Talk given at a conference Resonance light scattering of dye aggregates in thin films 07.04.2015 San Franzisko, United States of America Tisserant Jean-Nicolas; Heier Jakob;
ICSM International Conference on Synthetic Metals Talk given at a conference Growth and Alignment of Thin Film Organic Single Crystals from Dewetting Patterns 30.06.2014 Turku, Finland Hany Roland; Tisserant Jean-Nicolas; Mezzenga Raffaele; Heier Jakob;
E-MRS Spring Meeting Talk given at a conference Growth and Alignment of Thin Film Organic Single Crystals from Dewetting Patterns 27.05.2014 Lille, France Heier Jakob; Hany Roland; Mezzenga Raffaele; Tisserant Jean-Nicolas;


Awards

Title Year
EMRS Graduate Student Award 2014

Associated projects

Number Title Start Funding scheme
132502 Structured Templates of [6,6]-Phenyl C61-Butyric Acid Methyl Ester (PCBM) for Applications in Photovoltaics and Photonics 01.11.2010 Project funding (Div. I-III)
132502 Structured Templates of [6,6]-Phenyl C61-Butyric Acid Methyl Ester (PCBM) for Applications in Photovoltaics and Photonics 01.11.2010 Project funding (Div. I-III)
160116 Morphology control by ionic interactions of cyanine / PCBM bulk heterojunctions for photovoltaic applications 01.08.2015 Project funding (Div. I-III)
152909 Spacial and Morphological Control of Cyanine Dye Crystals 01.07.2014 Project funding (Div. I-III)

Abstract

This is a follow-up proposal to the SNF proposal Structured Templates of [6,6]-Phenyl C61-Butyric Acid Methyl Ester (PCBM) for Applications in Photovoltaics and Photonics, Ref. Nr 200021_132502, submitted to the SNF in October 2010. We here report the main achievements and main obstacles experienced towards the goal of the project. With this proposal we apply for 12 additional month of funding to guarantee a successful completion of the PhD thesis connected to the project.In proposal 200021_132502 we presented a strategy for controlling the supramolecular architecture in thin organic films that can find use in photovoltaics and photonics. We proposed to use liquid-liquid dewetting in a blend of fullerenes and cyanine dyes to form characteristic phase structures in the thin film. This mechanism has been pioneered by us and has the attribute that the characteristic length scale of the phase domains can be easily controlled. Most interestingly, the process of liquid-liquid dewetting leaves a nanostructured PCBM film that induces order (so called H-aggregation) in dye molecules. To make full use of the features, we proposed to synthesize a cross-linkable fullerene such that the obtained structures can be stabilized and be used as stable template films for further processing. Last but not least, we proposed to organize the PCBM domains of the template film into 2D photonic lattices by surface energy patterning. So far, we achieved the following:-Synthesis route for the fullerene derivate PCB-diyne which can be rendered insoluble upon heating.-PCB-diyne in thin films forms a mesoscopic structure similar to block-copolymer ordering. This highly organized surface was shown to organize dyes (and polythiophenes) into aggregates.-Generation of structured films of the PCB-diyne using the liquid liquid dewetting process. -We pinned down the mechanism how liquid-liquid dewetting responds to a surface energy pattern. -We demonstrated that dewetted dye droplets can grow into single crystalline domains. A super-ordinated dewetting structure induced molecular order in cyanine dye molecules, either in the form of aggregates or even larger, single crystalline domains. By manipulating the dewetted matrix film (patterned self-assembled monolayers), controlled growth of aggregates and crystals becomes possible.
-