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LED Materials Bring White Light and More

Photonics Spectra
Mar 2016
Whether working to create a white LED that consumers like — and that is affordable and sustainable — or finding new applications for LEDs at opposite ends of the spectrum, researchers and manufacturers are finding answers in new materials and in using known materials in new ways.

KAREN A. NEWMAN, GROUP PUBLISHER, karen.newman@photonics.com

Efficiency and stability may make LEDs the lighting choice of the future, but commonly used inorganic materials are expensive and creating the right kind of white light remains a challenge. Researchers around the world are looking for alternatives to cerium, yttrium and other rare-earth elements used in the phosphors added to LEDs to generate white light, and working to create light that will appeal to consumers. Beyond general illumination, LEDs from one end of the spectrum to the other

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GLOSSARY
quantum dots
Also known as QDs. Nanocrystals of semiconductor materials that fluoresce when excited by external light sources, primarily in narrow visible and near-infrared regions; they are commonly used as alternatives to organic dyes.  
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