Finding: Most current white-light LEDs require rare materials to fluoresce in the proper wavelengths. Many of the efficient phosphors contain rare earth elements. The two key rare earth materials that provide color LED lighting are europium and terbium.
The committee presents the following recommendations with respect to strategic materials for optics.
Recommendation: The U.S. R&D community should increase its leadership role in the development of nanostructured materials with designable and tailorable optical material properties, as well as process control for uniformity of production of these materials.
Recommendation: The United States should develop a plan to ensure the availability of critical energy-related materials, including solar cells for energy generation and fluorescent materials to support future LED development.