Deep‐Ultraviolet Micro‐LEDs Exhibiting High Output Power and High Modulation Bandwidth Simultaneously

Autor: Duo Li, Shangfeng Liu, Zeyuan Qian, Quanfeng Liu, Kang Zhou, Dandan Liu, Shanshan Sheng, Bowen Sheng, Fang Liu, Zhaoying Chen, Ping Wang, Tao Wang, Xin Rong, Renchun Tao, Jianbin Kang, Feiliang Chen, Junjie Kang, Ye Yuan, Qi Wang, Ming Sun, Weikun Ge, Bo Shen, Pengfei Tian, Xinqiang Wang
Rok vydání: 2022
Předmět:
Zdroj: Advanced Materials. 34:2109765
ISSN: 1521-4095
0935-9648
DOI: 10.1002/adma.202109765
Popis: Deep-ultraviolet (DUV) solar-blind communication (SBC) shows distinct advantages of non-line-of-sight propagation and background noise negligibility over conventional visible-light communication. AlGaN-based DUV micro-light-emitting diodes (µ-LEDs) are an excellent candidate for a DUV-SBC light source due to their small size, low power consumption, and high modulation bandwidth. A long-haul DUV-SBC system requires the light source exhibiting high output power, high modulation bandwidth, and high rate, simultaneously. Such a device is rarely reported. A parallel-arrayed planar (PAP) approach is here proposed to satisfy those requirements. By reducing the dimensions of the active emission mesa to micrometer scale, DUV µ-LEDs with ultrahigh power density are created due to their homogeneous injection current and enhanced planar isotropic light emission. Interconnected PAP µ-LEDs with a diameter of 25 µm are produced. This device has an output power of 83.5 mW with a density of 405 W cm
Databáze: OpenAIRE
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