High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication

Abstract

The evolution of next-generation cellular networks is aimed at creating faster, more reliable solutions. Both the next-generation 6G network and the metaverse require high transmission speeds. Visible light communication (VLC) is deemed an important ancillary technology to wireless communication. It has shown potential for a wide range of applications in next-generation communication. Micro light-emitting diodes (μLEDs) are ideal light sources for high-speed VLC, owing to their high modulation bandwidths. In this review, an overview of μLEDs for VLC is presented. Methods to improve the modulation bandwidth are discussed in terms of epitaxy optimization, crystal orientation, and active region structure. Moreover, electroluminescent white LEDs, photoluminescent white LEDs based on phosphor or quantum-dot color conversion, and μLED-based detectors for VLC are introduced. Finally, the latest high-speed VLC applications and the application prospects of VLC in 6G are introduced, including underwater VLC and artificial intelligence-based VLC systems.

High-performance warm white LED based on thermally stable all inorganic perovskite quantum dots

“…Due to the high PLQY and low-temperature solution processability, the inorganic CsPbBr 3 perovskite quantum dots (QDs) have been regarded as the promising candidate for emitters of efficient warm WLEDs 6,7 . Despite the rapid advances of CsPbBr 3 QDs, their commercial application in efficient warm WLEDs has been impeded, which is resulted from the poor stability of CsPbBr 3 QDs induced by the separation of conventional oleic acid (OA) ligands from the QDs surfaces.…”