Solid‐State Lighting: Photoluminescent Materials for Solid‐State Lighting: State of the Art and Future Challenges (Advanced Optical Materials 4/2015)

On page 424, J. Meyer and F. Tappe discuss the generation of white light from blue LEDs and luminescent materials with respect to currently available phosphors. Here, a rendered volume of a state-of-the-art LED is obtained by X-ray computed tomography (CT), to plan the preparation of microsections for more in-depth analysis. Inset, left to right: brightfield contrast in LM, overlay of luminescence contrast, and backscattered electron energy dispersive X-ray fluorescence mapping. Support by Prof. C. Thomas and T. Ogbazghi for microscopy and CT image acquisition is gratefully acknowledged.