Jakob Heier

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Publications associées (27)

Visible light-emitting host-guest electrochemical cells using cyanine dyes

Frank Nüesch, Beat Ruhstaller, Roland Hany, Lei Wang, Surendra Babu Anantharaman, Jakob Heier

Light-emitting electrochemical cells (LECs) can be fabricated as a single emissive organic/salt layer sandwiched between two electrodes, offering cost-effective next generation signage and lighting applications. Cyanine dyes are especially attractive to ex ...

Elsevier Science Bv2017

Ultrafast charge transfer in solid-state films of pristine cyanine borate and blends with fullerene

Jacques-Edouard Moser, Frank Nüesch, Jelissa Risse, Jakob Heier

Photoinduced electron transfer in light-absorbing materials is the first step towards charge separation and extraction in small molecule-based organic solar cells. The excited state dynamics of the cyanine dye cation Cy3 paired with a tetraphenylborate cou ...

Royal Society of Chemistry2015

Resonance Light Scattering in Dye-Aggregates Forming in Dewetting Droplets

Raffaele Mezzenga, Gian-Luca Bona, Roland Hany, Jakob Heier

Small organic semiconducting molecules assembling into supramolecular J- and H- aggregates have attracted much attention due to outstanding optoelectronic properties. However, their easy and reproducible fabrication is not yet sufficiently developed for in ...

American Chemical Society2014

Diyne-Functionalized Fullerene Self-Assembly for Thin Film Solid-State Polymerization

Raffaele Mezzenga, Gaëtan Wicht, Roland Hany, Jakob Heier

C-60 fullerene derivatives bearing aliphatic chains can self-assemble into versatile supramolecular structures. Cross-linking of such self-assembled morphologies is an attractive approach to enhance the structural stability of these self-organized structur ...

American Chemical Society2014

Growth and Alignment of Thin Film Organic Single Crystals from Dewetting Patterns

Raffaele Mezzenga, Gaëtan Wicht, Thomas Geiger, Gian-Luca Bona, Roland Hany, Jakob Heier

Studying and understanding the conditions under which organic semiconductors can be engineered to form aligned single crystals in thin films is of primary importance owing to their unique orientation-dependent optoelectronic properties. Efforts to reach th ...

Amer Chemical Soc2013

Dewetting-driven hierarchical self-assembly of small semiconducting molecules

Raffaele Mezzenga, Gian-Luca Bona, Roland Hany, Jakob Heier

We describe the self-organization of PCBM and a cyanine dye on chemically patterned surfaces during spin coating from solution. On homogeneous surfaces, a transient bilayer forms, which in a later stage decomposes into PCBM droplets in a matrix of the cyan ...

2012

Poly(3-hexylthiophene)/C-60 heterojunction solar cells: Implication of morphology on performance and ambipolar charge collection

Alain Geiser, Roland Hany, Bin Fan, Jakob Heier

The performance of heterojunction organic solar cells is critically dependent on the morphology of the donor and acceptor components in the active film. We report results of photovoltaic devices consisting of bilayers and bulk heterojunctions using poly(3- ...

2008

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