Enhancing bandwidth and efficiency in GaN LEDs for VLC systems
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...
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| Main Authors: | , |
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| Format: | Article |
| Language: | en |
| Published: |
IEEE Photonics Society, Malaysia Chapter
2025
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/124836/3/124836_Enhancing%20bandwidth%20and%20efficiency.pdf http://irep.iium.edu.my/124836/ https://www.optoe.my/index.php/optoe/article/view/45 |
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| Summary: | 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 high-lights these innovations for high- speed VLC systems. |
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