LEDs FROM FOOD WASTE

 

UV LED Lichtkegel

Energy-saving light bulbs and TVs contain LEDs, which produce light crystals called ‘quantum dots’. At the University of Utah, scientists have learned how to make quantum dots from food waste – specifically, chemicals in discarded pieces of bread, tortilla and soft drinks. The goal is to produce more environmentally friendly LEDs than those made from cadmium selenide, which is toxic when it breaks down.