bandgap

Swansea University in Wales has installed gallium tri-oxide (Ga2O3) deposition equipment at its Centre for Integrated Semiconductor Materials (CISM). In the β crystal form, Ga2O3 is an ultra-wide bandgap semiconductor (~4.8eV), suiting it to high voltage semiconductors. The semiconductor can also be used in ultra-violet detectors. CISM has an MOCVD (metal-organic chemical vapour deposition) laboratory built around Aixtron equipment, to ...

Researchers at Chiba University in Japan have uncovered a rule of organic solar cell materials that could guide their development, or at least stop people hunting for the impossible. It is that the exciton binding energy in a material is a quarter of its transport bandgap, regardless of the material. “A previously unpredicted nature of exciton binding energies in organic ...

While graphene has some amazing physical, optical and mechanical properties, its lack of a natural bandgap limits its use in electronics. Methods of varying complexity have been found to add bandgaps, and now there is another tool in the box – a chemical whose molecules self-assemble into an evenly-spaced flat lattice as they bond down into the graphene and give ...

Linear Tech is claiming a record for its latest voltage reference – the lowest drift bandgap ever – at 1.5ppm/°C, or 30ppm long-term. Called the LT6657, low frequency (0.1-10Hz) noise is also good at 0.5ppmp-p, as is 35ppm of thermal hysteresis. Wired as a low-drop series reference is needs a supply of as little as 50mV over its 2.5V output to ...

University of Manchester scientists have turned graphene into a semiconductor. The key has been to fully fluorinate the material, turning it into the two-dimensional equivalent of...

According to MIT, a GaSb PV cell has a bandgap energy of 0.7eV so will convert light of 1.7µm or shorter wavelength into electron-hole pairs - visible light stretches roughly from 700 (red) to 400nm (blue).

Taking light energy and converting it into electrical energy, the solar cell is an ecological device. The light absorbing material of a solar cell will lead to photogeneration of charge carriers and a conductive contact will carry off the electrons into another wire or circuit.

Imperial College is on the way to making an indium-based polymer, with implications for photo-emitters and detectors

Researchers at Philips have grown III-V semiconductors on silicon and germanium substrates