Press Releases / Pressemitteilungen

pinMOS: Novel Memory Device Combining OLED and Insulator Can Be Written on and Read out Optically or Electrically

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figure 1: pinMOS memcapacitor - scheme. author: Yichu Zheng
The pinMOS memory - an organic semiconductor device resulting from the combination of an OLED and a capacitor. It has the characteristics of a Memcapacitor, interacts with light and can be written and erased step by step. (C) Yichu Zheng.

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Scientists of the Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and the Center for Advancing Electronics Dresden (cfaed) at TU Dresden have developed a novel storage technology based on the combination of an organic light-emitting diode (OLED) and an insulator. This device allows reading the stored information optically as well as electrically. Moreover, the information can be added in portions - thus several storage states can be mapped in one device. The results have now been published in the renowned journal "Advanced Functional Materials".

Another novelty was related to the measurements in the test series: They were carried out exclusively using the innovative "SweepMe!” measuring software, which was developed by an IAPP / cfaed start-up of the same name.

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Bottom-up Synthesis of Crystalline 2D Polymers: A Dream Finally Comes True

Center for Advancing Electronics Dresden (cfaed), Press Release 24 September, 2019

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Left: Schematic illustration for the SMAIS method for 2D polymer synthesis (by Marc Hermann, TRICKLABOR). Right: High-resolution transmission electron microscopic image for 2D polyimide (by Dr. Haoyuan Qi, University of Ulm)

 

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Scientists at the Center for Advancing Electronics Dresden (cfaed) at TU Dresden have succeeded in synthesizing sheet-like 2D polymers by a bottom-up process for the first time. A novel synthetic reaction route was developed for this purpose. The 2D polymers consist of only a few single atomic layers and, due to their very special properties, are a promising material for use in electronic components and systems of a new generation. The research result is a collaborative work of several groups at TU Dresden and the Ulm University and was published this week in two related articles in the scientific journals "Nature Chemistry" and "Nature Communications".

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Fluctuation-induced Distributed Resonances in Oscillatory Networks and Power Grids

Press Release - cfaed, 31 July, 2019

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Generality of response patterns.

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Scientists from the Center for Advancing Electronics Dresden (cfaed) at TU Dresden, together with partners from other German universities and research institutions, have investigated how highly complex dynamical systems react to external influences using the example of power grids. The results contribute to an understanding of the processes that take place, for example, during the feeding of weather-dependent and thus strongly fluctuating renewable energies into the power grids. However, they can be transferred to various types of dynamical networks. The study has been published in the journal "Science Advances" on 31 July, 2019.

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Tuning the Energy Levels of Organic Semiconductors

Press Release from 04 July, 2019

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Examples of film structures used for the calculations of the charge - quadrupole interaction energy (EQ) of crystalline films in edge-on (a) and face-on orientation (b). The molecules are represented by discs for illustration purpose. The length scale is given in Å. EQ values are calculated for the red molecules at the film surface. Author: Frank Ortmann

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Physicists from the Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and the Center for Advancing Electronics Dresden (cfaed) at the TU Dresden, together with researchers from Tübingen, Potsdam and Mainz were able to demonstrate how electronic energies in organic semiconductor films can be tuned by electrostatic forces. A diverse set of experiments supported by simulations were able to rationalize the effect of specific electrostatic forces exerted by the molecular building blocks on charge carriers. The study was published recently in Nature Communications.

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Shell Increases Versatility of Nanowires

Laboratory experiments show that semiconductor nanowires can be tuned over wide energy ranges

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Cross-section of a nanowire featuring a gallium arsenide core, an indium aluminum arsenide shell, and an indium gallium arsenide capping layer (gallium is shaded blue, indium red and aluminum cyan). For comparison, the white bar indicates a scale of 30 nanometers. The image was produced by energy-dispersive X-ray spectroscopy. Source: HZDR/René Hübner

Press release by Helmholtz Center Dresden Rossendorf (HZDR) of June 26, 2019

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Nanowires promise to make LEDs more colorful and solar cells more efficient, in addition to speeding up computers. That is, provided that the tiny semiconductors convert electric energy into light, and vice versa, at the right wavelengths. A research team at Helmholtz-Zentrum Dresden-Rossendorf (HZDR) has managed to produce nanowires with operating wavelengths that can be freely selected over a wide range – simply by altering the shell structure. Fine-tuned nanowires could take on several roles in an optoelectronic component, without having to resort to different materials. That would make the components more powerful, more cost-effective, and easier to integrate, as the team reports in Nature Communications (doi: 10.1038/s41467-019-10654-7).

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