Researchers in China suggest micro-machining could be used to create almost flat Fresnel lenses that boost the electrical efficiency of solar panels.  Using Fresnel lenses to design solar panels could lead to fewer solar cells in a panel taking in the same area of light.  Such designs could be much less expensive. The team’s technology […]

University of Michigan electrical engineers have built a piezoelectric generator that can harness energy from vibrations and convert it to electricity with five to 10 times greater efficiency and power than other devices in its class. It’s smaller than a penny. The UM team has built a complete system that integrates a high-quality energy-harvesting piezoelectric […]