Gallium Nitride (GaN), grown on a silicon substrate, to manufacture light-emitting diodes. The material is critical to making LED lighting, which researchers and the Government agree could cut UK electricity consumption by 10-15%. Credit: University of Cambridge Department of Materials Science & Metallurgy

Gallium Nitride (GaN), grown on a silicon substrate, to manufacture light-emitting diodes. The material is critical to making LED lighting, which researchers and the Government agree could cut UK electricity consumption by 10-15%. Credit: University of Cambridge Department of Materials Science & Metallurgy