A new study by King Abdullah University of Science and Technology (KAUST) and King Abdulaziz City for Science and Technology (KACST) has discovered a way to reduce the carbon emissions of LED streetlights by using a nanomaterial called nanoPE. This material enhances the emission of thermal radiation from the surface of the LED, reducing the LED temperature and increasing the lifespan of the LED. The study estimates that the US alone can reduce carbon dioxide emissions by over 1 million metric tons.
The researchers found that by directing the thermal radiation away from the object to be illuminated and towards the sky, they can reduce the energy loss and improve the efficiency of the LED. They achieved this by creating a thin sheet of nanoPE with pores as small as 30 nm, which reflects low-wavelength light (visible light) but passes high-wavelength light (infrared).
The study suggests that by using nanoPE-coated LED streetlights, the world can reduce its carbon emissions from lighting, which accounts for 20% of the world’s electricity consumption and 6% of global greenhouse gas emissions. The researchers believe that this technology can have a significant impact on sustainability.