In a groundbreaking development, South Korean researchers from the Korea Advanced Institute of Science and Technology (KAIST) and the Korea Research Institute of Standards and Science (KRISS) have unveiled a new Li-Fi device. This innovative technology promises data transmission speeds 100 times faster than traditional Wi-Fi, revolutionizing wireless communication.
Li-Fi, which uses the visible light spectrum for data transmission, has the potential to surpass Wi-Fi speeds significantly. The team, led by Professor Himchan Cho and Dr. Kyung-geun Lim, developed high-efficiency light-emitting triodes using eco-friendly quantum dots. These devices concentrate the electric field in microscopic "pinhole" regions of permeable electrodes to produce light, enabling simultaneous transmission of two different data streams.
The developed "on-device encryption optical transmission device" technology encrypts data while converting it into light, eliminating the need for an additional encryption device. The new device boasts an external quantum efficiency (EQE) of 17.4% and a brightness of 29,000 nits, exceeding the brightness of a typical smartphone screen by ten times. This technology could revolutionize high-security and high-speed environments like hospitals, defense, and finance.