Our institute has moved

Our institute has moved within the Walter-Schottky-Haus (WSH). From now on you find us on the second floor in building section C of the WSH. Please refer to the MEMBERS section on our homepage for the new room allocations and telephone numbers of our employees. Our postal address stays the same. … [Read more...]

Obituary – Professor Dr. phil. Heinrich Kurz

Filled with consternation we take leave of Professor Dr. phil. Heinrich Kurz who passed away on March 12th, 2016 at the age of 72. Professor Kurz was an exceptional person with impressive achievements in science and in the organization of science. After obtaining his doctoral degree in 1971 at the University of Vienna he worked for 10 years at the Philips Research Laboratories in Hamburg. He joined the group of Professor Nicolaas Bloembergen at Harvard University from 1981 to 1984 before he became Professor of Electrical Engineering at RWTH Aachen University in 1984. Three years later, in 1987 he received the “Alfried-Krupp-Förderpreis” Award in ultrafast optoelectronics for young … [Read more...]

Open Bachelor/Master thesis: Circuit simulation for high-sensitive cantilever array sensors

Within the new project about cantilever-field-effect transistors, funded by the Hans L. Merkle foundation, we offer a bachelor/master thesis for students in the field of electrical engineering, physics or material science. The topic of the thesis is circuit simulation for high-sensitive cantilever array sensors. We want to develop an integrated circuit which benefits from the specific cantilever properties, thus the focus is on circuit design and simulation. Main purpose is to enable the use of cantilever sensors in current sensor applications and therefore to make the technology available for a wider market. For further information please have a look at the details (german) or contact … [Read more...]

New projects

DFG project within Priority Program “Graphene” In addition to an extension of an existing project on graphene-based band-to-band tunnel field-effect transistors, the DFG has granted the project “Strained graphene field-effect transistors - A nano-electro-mechanical transistor with MOSFET-like on currents and superior switching behavior”. The project starts at the end of 2013 and will run for the next three years. Hans L. Merkle Foundation funds project on novel cantilever-based sensors The new project „Cantilever-field-effect transistors for the quantitative and qualitative detection of gases” aims at the realization of cantilever sensors that are based on a novel way of electronic … [Read more...]

New Project within DFG Priority Program SPP 1613

Within the priority program "Fuels Produced Regeneratively Through Light-Driven Water Splitting: Clarification of the Elemental Processes Involved and Prospects for Implementation in Technological Concepts" (SPP 1613) the DFG has granted the project “A Monolithic All-Silicon Multi-Junction Photovoltaic Electrolysis Device for Solar Hydrogen Production by Direct Water Splitting”. The project will be funded for three years. … [Read more...]

In the Press: DuPont™ Solamet® PV17x Photovoltaic Metallization Enables Lightly Doped Emitter Technology

In this work we report for the first time on successful direct contacting of high sheet resistance emitter at 100 Ohm/sq by emitter profile manipulation. The formation of lightly doped emitter via POCl3 diffusion was investigated and optimized by the variation of temperature, time and gas fluxes. By increasing the n++ layer and at the same time reducing the peak concentration of inactive phosphorous doping, an efficiency gain of up to 1% absolute was achieved for multicrystalline silicon (mc-Si) solar cells. Based on these investigations we evaluated a 160 Ohm/sq emitter and could demonstrate by laser doping that n++ layer of up to 6.5 x 1018cm -3 leads to high FF and an absolute … [Read more...]

IHT Member awarded at the SiliconPV 2012 Conference

From 3rd till 5th of April the 2nd International Conference on Silicon Photovoltaics (SiliconPV 2012) took place in Leuven, Belgium. More than 200 abstracts from more than 20 countries worldwide have been handed in for review, 35% more than 2011. The  paper  "Generation of Defect-Related Acceptor States by Laser Doping" by our Research Assistant Ali Safiei got awarded as one of the ten best papers of the conference.  The paper will be published in SOLMAT. … [Read more...]

New homepage is online!

A preliminary version of the institute’s new homepage is now online. The redesign aims at providing updated information on IHT’s research and teaching activities. The homepage is still under construction and will be modified accordingly within the next few weeks. Please check regularly for updates and in particular for new job openings. Click here to access the old webpage. … [Read more...]

Properties of Metal-Graphene Contacts

Utilizing a dual-gate field-effect transistor (FET) device, we were able to deliberately adjust an energetic separation between the Fermi level and the Dirac point in the contact areas of graphene FETs thereby mimicking the metal induced doping effect. A back-gate voltage sweep enables identifying two distinct resistance peaks - a result of the combined impact of the graphene cones in the contact and in the channel region. Comparing our experimental data with simulations we were able to extract the coupling strength between metal and graphene and also to estimate the magnitude of the metal-induced doping concentration. The results will be published in the next issue of IEEE Transactions on … [Read more...]

“Teaching-Learning” provides funds to develop a new class

Within the „Teaching-Learning“-Initiative funded by the Mercator and Volkswagen Foundations the Institute of Semiconductor Electronics will develop an integrated class called “Simulation and fabrication of nanoelectronics devices” where students actively work on the realization of a simple quantum-based device simulator as well as on the fabrication and characterization of their own, simple CMOS chip. The course will be offered for the first time in the summer term 2013. We are currently seeking student workers for the development of the class. … [Read more...]