Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Stable silicon layer makes flat-panel display cheaper

19.03.2002


In a joint project between the Technology Foundation STW and the energy agency Novem at Utrecht University, researchers have developed new silicon layers which are more stable and cheaper than the present amorphous silicon layers. The electronic properties of the present layers in laptop screens and solar cells deteriorate if the material is under ‘stress’, for example due to sunshine or a voltage.



Flat-panel displays and solar cells have a substrate of glass or plastic, which is coated with a thin layer of amorphous silicon. The silicon layer is a semiconductor which, under the influence of a brief local voltage, becomes conductive for a fraction of a second. This property makes it possible to create a potential difference via the amorphous silicon which addresses separate pixels in an active-matrix LCD display. However, the disadvantage of amorphous silicon is its instability. The threshold voltage needed to make the silicon conducting, changes if a prolonged gate voltage is applied. This is the case in thin film transistors, the devices which address the pixels in a flat-panel display. The microscopic mechanism of this ‘metastability’ is still not understood. Accordingly the application of amorphous silicon for thin film transistors in flat-panel displays and solar cells has not yet reached its full potential.
In the research project from STW and Novem, the Utrecht researchers tried to improve the electronic material properties of the silicon layers. They developed silicon layers which are more stable than the commonly used layers of amorphous silicon. By means of a simple method, hot-wire chemical vapour deposition, they also managed to deposit this layer at a rate ten times higher than conventional techniques. This considerably reduces the production costs of flat-panel displays and solar cells. This could be interesting for manufacturers of displays and solar cells and for the semiconductor industry.

For further information please contact Dr Bernd Stannowski (Debye Institute, Utrecht University), tel. + 31(0) 30 2532964, fax +31 (0)30 2543165, e-mail b.stannowski@phys.uu.nl. Information is also available on the Internet at www1.phys.uu.nl/wwwgf. The doctoral thesis was defended on 27 February 2002. Mr Stannowski’s supervisors were Prof. R.E.I. Schropp and Prof. W.F. van der Weg.

Michel Philippens | alphagalileo

More articles from Information Technology:

nachricht Shaping nanoparticles for improved quantum information technology
15.10.2019 | DOE/Argonne National Laboratory

nachricht Controlling superconducting regions within an exotic metal
11.10.2019 | Ecole Polytechnique Fédérale de Lausanne

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Solving the mystery of quantum light in thin layers

A very special kind of light is emitted by tungsten diselenide layers. The reason for this has been unclear. Now an explanation has been found at TU Wien (Vienna)

It is an exotic phenomenon that nobody was able to explain for years: when energy is supplied to a thin layer of the material tungsten diselenide, it begins to...

Im Focus: An ultrafast glimpse of the photochemistry of the atmosphere

Researchers at Ludwig-Maximilians-Universitaet (LMU) in Munich have explored the initial consequences of the interaction of light with molecules on the surface of nanoscopic aerosols.

The nanocosmos is constantly in motion. All natural processes are ultimately determined by the interplay between radiation and matter. Light strikes particles...

Im Focus: Shaping nanoparticles for improved quantum information technology

Particles that are mere nanometers in size are at the forefront of scientific research today. They come in many different shapes: rods, spheres, cubes, vesicles, S-shaped worms and even donut-like rings. What makes them worthy of scientific study is that, being so tiny, they exhibit quantum mechanical properties not possible with larger objects.

Researchers at the Center for Nanoscale Materials (CNM), a U.S. Department of Energy (DOE) Office of Science User Facility located at DOE's Argonne National...

Im Focus: Novel Material for Shipbuilding

A new research project at the TH Mittelhessen focusses on the development of a novel light weight design concept for leisure boats and yachts. Professor Stephan Marzi from the THM Institute of Mechanics and Materials collaborates with Krake Catamarane, which is a shipyard located in Apolda, Thuringia.

The project is set up in an international cooperation with Professor Anders Biel from Karlstad University in Sweden and the Swedish company Lamera from...

Im Focus: Controlling superconducting regions within an exotic metal

Superconductivity has fascinated scientists for many years since it offers the potential to revolutionize current technologies. Materials only become superconductors - meaning that electrons can travel in them with no resistance - at very low temperatures. These days, this unique zero resistance superconductivity is commonly found in a number of technologies, such as magnetic resonance imaging (MRI).

Future technologies, however, will harness the total synchrony of electronic behavior in superconductors - a property called the phase. There is currently a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

International Symposium on Functional Materials for Electrolysis, Fuel Cells and Metal-Air Batteries

02.10.2019 | Event News

NEXUS 2020: Relationships Between Architecture and Mathematics

02.10.2019 | Event News

Optical Technologies: International Symposium „Future Optics“ in Hannover

19.09.2019 | Event News

 
Latest News

Phagocytes versus killer cells - A closer look into the tumour tissue

21.10.2019 | Life Sciences

A new stable form of plutonium discovered at the ESRF

21.10.2019 | Physics and Astronomy

Candidate Ebola vaccine still effective when highly diluted, macaque study finds

21.10.2019 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>