Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.033
Publication date: 18th December 2023
Printing technology is set to enable the high-throughput low-cost and customized fabrication of optoelectronic and sensors devices. For this goal to become a reality, this functional printing approach should encompass a material process development which enables high device performance and industrial compatibility, thus enabling a facile transfer of research results into consumer applications.
In this contribution, I will present the fabrication of fully printed organic photodiodes (OPDs) by digital printing techniques (e.g. aerosol and inkjet). The devices show mechanical flexibility, semitransparency and an excellent reproducibility. I will discuss the use of the ink formulation as way to access and tailor material optoelectronic properties. In this direction, we have focused on the control of the molecular order in organic semiconductors though an inkjet printing process. This enabled us to deposit functional polymers with a high degree of alignment and explore its use in polarization sensitive OPDs. Secondly, I will outline our recent efforts in the fabrication of inkjet printed OPDs based on novel non-fullerene acceptors (NFAs). The devices show a photo-response up to 800nm and reach record responsivities of 400mA/W as well as cut-off frequencies surpassing 2MHz. Furthermore, we demonstrate the successful decoupling of the optical and rheological properties by using a visibly transparent polymer donor and color-selective NFAs. This approach offers spectral flexibility without the need for a variation in process parameters. The choice of NFA enabled devices with color selectivity in the ranges of 400-600nm and 500-800nm enabling a proof of concept filterless visible-light communication system. Finally, I will present the fabrication printed passive and active matrix OPD arrays.
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Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
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