Enhancing Bandwidth and Efficiency in GaN LEDs for VLC Systems
DOI:
https://doi.org/10.53655/joe.v3332mKeywords:
LED, VLC, Rare-Earth Doping, Europium (Eu3 ), GaN-LEDAbstract
Gallium nitride (GaN) light-emitting diodes (LEDs) are essential for visible light communication (VLC), enabling high-speed data transmission and energy-efficient lighting. However, c-plane GaN LEDs face limitations due to polarization fields and the quantum-confined Stark effect (QCSE), restricting bandwidth and data rates. Advances in semi-polar and non-polar GaN structures have enhanced bandwidth, supporting gigabit-per-second VLC performance. Optimizing the active region through quantum well thinning and hybrid quantum dot integration further boosts modulation speeds. Additionally, Europium (Eu³⁺) doping provides high-color-purity red emission and faster recombination, improving bandwidth and reducing efficiency droop. This review highlights these innovations for high-speed VLC systems.
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