Organic Thin Film Devices: Relaxation Energy Strongly Determined by Laws of Quantum Theory

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graphic: polaron relaxation, copyright Dr. Frank Ortmann Group
Illustration of molecular vibrations in donor-acceptor blends which affect charge transport in organic thin-film devices.

(Deutsche Version unter "read more")

The Computational Nanoelectronics Group of cfaed's new Independent Research Group Leader Dr. Frank Ortmann in collaboration with international partners have investigated the polaron relaxation within organic solar cells. Their results indicate a change in paradigm towards considering this quantum effect appropriately. The work was published in the ACS - Journal of the American Chemical Society in January 2017.

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Back to the roots: Germanium outperforms silicon in energy efficient transistors with n- und p- conduction

Press Release of NaMLab / cfaed, February 3, 2017


NaMLab: Energy-efficient germanium nanowire transistor
Energy-efficient germanium nanowire transistor with programmable p- and n- conduction. Transmission electron microscope image of cross section.

(Deutsche Version unten)

NaMLab and cfaed reached an important breakthrough in the development of energy-efficient electronic circuits using transistors based on germanium

Dresden, Germany, February 3, 2017
A team of scientists from the Nanoelectronic Materials Laboratory (NaMLab gGmbH) and the Cluster of Excellence Center for Advancing Electronics Dresden (cfaed) at the Dresden University of Technology have demonstrated the world-wide first transistor based on germanium that can be programmed between electron- (n) and hole- (p) conduction. Transistors based on germanium can be operated at low supply voltages and reduced power consumption, due to the low band gap compared to silicon. Additionally, the realized germanium based transistors can be reconfigured between electron and hole conduction based on the voltage applied to one of the gate electrodes. This enables to realize circuits with lower transistor count compared to state-of-the-art CMOS technologies.

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Hermann-Krone-Bau: Applied Physics Building Handed Over to TU Dresden

cfaed to Use Lab Space in the New Building

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The TU Dresden has a new building! On 23 January, the ceremonial handover of the "Hermann-Krone-Bau" was celebrated at the campus. The new "Applied Physics" Building will be mainly used by the Dresden Integrated Center of Applied Physics and Photonic Materials (IAPP) led by Prof. Karl Leo. cfaed will also operate two labs in this building which will be run by groups around Prof. Sibylle Gemming (HZDR / TU Chemnitz), Prof. Thomas Mikolajick (TU Dresden / NaMLab), and Dr. Artur Erbe.

See the full press release of the Saxon State Ministry of Finances (in German):

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INSPIRE Grant Report by PhD Student Thomas Kämpfe - Stanford University, USA

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It’s the heart of the Silicon Valley, Stanford University, one of the most prestigious universities in the world, especially in the field of advancing electronics. As a cfaed researcher, I had the chance to spend three months together with the group of Prof. ZX Shen in cooperation with PrimeNano. All this was made possible only by the cfaed INPSIRE Grant I was awarded within the 10/2015 call. My project aimed on resolving conductance variations on the nano-scale in low-dimensional conductors with spatially resolved microwave impedance microscopy (MIM).

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Random Access Memory on a Low Energy Diet: Researchers from Dresden and Basel develop basis for a novel memory chip

Press release of HZDR, January 3, 2017

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The prototype of an antiferromagnetic magnetoelectric memory chip, which was invented by researchers from Dresden and Basel. It consists of a thin layer of chromium oxide (Cr2O3) for saving data, on top of which the physicists attached a nanometer-thin platinum layer for read out. Picture: T. Kosub

Researchers from HZDR Dresden, IFW Dresden, cfaed, and University of Basel developed a basis for a novel memory chip. See the press release of HZDR:

Memory chips are among the most basic components in computers. The random access memory is where processors temporarily store their data, which is a crucial function. Researchers from Dresden and Basel have now managed to lay the foundation for a new memory chip concept. It has the potential to use considerably less energy than the chips produced to date – this is important not only for mobile applications but also for big data computing centers. The results are presented in the latest volume of the scientific journal “Nature Communications”.

Read full press release at