DOI: https://doi.org/10.29363/nanoge.emlem.2022.041
Publication date: 15th July 2022
The use of solution‐based materials is the key to making new devices accessible within the field of organic and hybrid electronics. It also enables manufacturing at a high-throughput industrial scale, by being compatible with scalable fabrication techniques, such as inkjet printing. This technique offers both the capabilities of coating as well as precise control of the deposited material during processing. Expanding these capabilities to combinatorial inkjet printing allows the deposition of multiple inks in a single printing step – again, with precise control of the droplet ratio during printing – to produce films with tunable composition.
One class of solution-processed materials utilisable in this way are metal halide perovskites, which have contributed to significant performance increases when employed as active material in solar cells and hybrid light-emitting diodes (LEDs) during the past decade. However, no active material can function alone in an optoelectronic device, but must be sandwiched between two electrodes, of which at least one must be transparent. By moving away from the ubiquitous material indium tin oxide (ITO), a wide variety of transparent conducting electrodes can be utilised that overcome some of the inherent limitations of ITO, such as its brittleness.
This contribution highlights our work on these two main avenues of optoelectronic device research: the processing of active materials in hybrid and organic optoelectronics [1-3], and the implementation of ITO-free transparent conducting electrodes [4-7]. The findings presented address the importance of continuing work in organic and hybrid (opto)electronic devices, in order to move towards high performance flexible electronics.
This work was carried out in the framework of the Joint Lab GEN_FAB and with the support of the Helmholtz Innovation Lab HySPRINT. Funding is acknowledged from the German Ministry of Education and Research (BMBF) for the Young Investigator Group Hybrid Materials Formation and Scaling (HyPerFORME) within the program “NanoMatFutur” (grant no. 03XP0091), as well as the Helmholtz Energy Materials Foundry (HEMF) and PEROSEED (ZT-0024) project.
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