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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 11: Organic Electronics and Photovoltaics, Electrical and Optical Properties (joint session CPP/KFM)

KFM 11.1: Hauptvortrag

Donnerstag, 30. September 2021, 13:30–14:00, H3

Nanophotonic structures by inkjet printing — Yidenekachew J. Donie¹, Qiaoshuang Zhang¹, Guillaume Gomard^1,2,3, and •Uli Lemmer^1,2 — ¹Light Technology Institute, Karlsruhe Institute of Technology (KIT), Germany — ²Institute of Microstructure Technology (KIT), Karlsruhe Institute of Technology, Germany — ³present address: Carl Zeiss AG, Eggenstein-Leopoldshafen, Germany

Inkjet printing (IJP) is a versatile method for additive manufacturing of electronic and optoelectronic devices with a typical spatial resolution on the order of 30 microns. For realizing photonic nanostructures using this approach, the deposited materials have to be controlled on a subwavelength length scale. Here, we demonstrate that this can be realized, both, in vertical and in lateral direction. Using the spontaneous phase-separation of two polymers from a common ink, we realize quasi-periodic and disordered assemblies of light scatterers. The phase separated nanostructures feature sizes that can be tuned from a few microns down to the sub-100 nm level. Applications are in the field of photonic sensors and organic optoelectronic devices. An even more precise control is necessary for realizing one-dimensional photonic crystals (dielectric mirrors) by IJP. Such an approach enables digitally controlled dielectric mirror pixels for various opto-electronic applications.