Engineering

A 20 kW laser system for producing high-purity crystals

High-purity semiconductor crystals are required for power electronics in electric cars or in photovoltaics. When such crystals reach a diameter of 2 inches, they become relevant for industrial applications.

Electronics & Semiconductors

Using sound to test devices, control qubits

Acoustic resonators are everywhere. In fact, there is a good chance you're holding one in your hand right now. Most smart phones today use bulk acoustic resonators as radio frequency filters to filter out noise that could ...

Energy & Green Tech

New solar panels from solar panel waste

Solar energy is good news for planet Earth—but solar panels are not as climate-friendly as they should be. Researcher Martin Bellmann is using what he calls the "black gold" waste materials from solar panel manufacture ...