2021-07-23

Tunnel-Junction Blue/Green μLED Stacks

University of California Santa Barbara (UCSB) in the USA has reported on the use of tunnel junctions (TJs) to stack green and blue micro-sized light-emitting diodes (μLEDs) grown by metal-organic chemical vapor deposition (MOCVD) [Panpan Li et al,  Optics Express, vol29, p22001, 2021; Panpan Li et al, Appl. Phys. Lett., vol118, p261104, 2021].   The researchers comment: “The design enables the realization of cascaded blue/green μLEDs in one device with independent junction control, that is, we can control the blue μLED...
Continue reading

microLEDs: from headlamps to the data center When we think about the evolution of AI technology, developments in machine learning and large language models come readily to mind, as do the latest graphics processing units (GPUs), high-bandwidth... READ MORE

The question of what makes a building "smart" has been debated in the industry for years. ams OSRAM provided a clear answer at Light + Building 2026: it is light — not as illumination, but as a sensory nervous system. It percei... READ MORE