Concept
Lampe électroluminescente
Publications associées (110)
III-N blue-emitting epi-structures with high densities of dislocations: Fundamental mechanisms for efficiency improvement and applications
Since the dawn of humanity, human beings seeked to light their surroundings for their well-being, security and development. The efficiency of ancient lighting devices, e.g. oil lamps or candles, was in the order of 0.03-0.04% and jumped to 0.4-0.6% with th ...
EPFL2024Optical Diffraction Tomography Using Nearly In-Line Holography with a Broadband LED Source
Demetri Psaltis, Abhijit Roy, Ahmed Ayoub
We present optical tomography methods for a 3D refractive index reconstruction of weakly scattering objects using LED light sources. We are able to record holograms by minimizing the optical path difference between the signal and reference beams while sepa ...
MDPI2022Separation and Recycling Potential of Rare Earth Elements from Energy Systems: Feed and Economic Viability Review
Christian Ludwig, Rudolf Paul Wilhelm Jozef Struis, Ajay Bhagwan Patil, Viktoria Paetzel
This review explores the potential of separating and recycling rare earth elements (REEs) from different energy conversion systems, such as wind turbines, electric vehicles batteries, or lighting devices. The REEs include 17 elements (with global productio ...
2022