Analysis of InGaN Multiple-Quantum-Well Photoelectric Device of Visible Light Communication

2020 ◽  
Vol 15 (7) ◽  
pp. 909-916
Author(s):  
Haitao Chi ◽  
Yu Du ◽  
Gongyu Li
Keyword(s):  
Quantum Well ◽  
Visible Light ◽  
High Speed ◽  
Visible Light Communication ◽  
Multiple Quantum ◽  
Modulation Bandwidth ◽  
Carrier Distribution ◽  
Photoelectric Device ◽  
Electron Leakage ◽  
Modulation Speed

The key to achieving high-speed and high-quality visible light communication is to increase the modulation speed of Light-Emitting Diode (LED). Therefore, in this study, the influence of the Composite Mechanism of Carrier (CMC) on the modulation speed of LED is studied by designing different structures of the InGaN Multi-quantum-well (MQW) LED active region. Because the carrier subspace waves function of narrow quantum well LED overlaps more frequently and the electron leakage effect is more significant, the compound rate is faster and the modulation bandwidth is higher. InGaN quantum barrier LED with a content of 1% can increase the weight of radiation recombination, which makes the modulation bandwidth higher than GaN quantum barrier LEDs; when the in content is 5%, electron leakage and Auger recombination have a dominant position. Moreover, because these two compounding mechanisms have a fast compounding rate, the modulation bandwidth is significantly increased. Then the 405 nm laser-excited photoluminescence (PL) is introduced to analyze the carrier dynamics in the LED and obtain the related processes of carrier distribution and transport. The proposed carrier microscopic model can well explain change characteristics of the PL luminescence peak, luminous intensity, and half-height width of InGaN/GaN MQW LED with different excitation wavelengths. At low temperature, the PL peak of the InGaN/GaN quantum well LED redshifts with the increase of temperature, because the weakly bound carrier transfers the obtained energy to the deeply bound energy level of high In content.

scholarly journals Polymer colour converter with very high modulation bandwidth for visible light communications

2017 ◽  
Vol 5 (35) ◽  
pp. 8916-8920 ◽  
Author(s):  
D. A. Vithanage ◽  
A. L. Kanibolotsky ◽  
S. Rajbhandari ◽  
P. P. Manousiadis ◽  
M. T. Sajjad ◽  
...  
Keyword(s):  
Visible Light ◽  
High Speed ◽  
Visible Light Communication ◽  
Modulation Bandwidth ◽  
Visible Light Communications ◽  
Semiconducting Polymer ◽  
High Modulation ◽  
Very High

We report the synthesis, photophysics and application of a novel semiconducting polymer as a colour converter for high speed visible light communication.

scholarly journals Simultaneous light emission and detection of InGaN/GaN multiple quantum well diodes for in-plane visible light communication

2017 ◽  
Vol 387 ◽  
pp. 440-445 ◽  
Author(s):  
Yongjin Wang ◽  
Yin Xu ◽  
Yongchao Yang ◽  
Xumin Gao ◽  
Bingcheng Zhu ◽  
...  
Keyword(s):  
Quantum Well ◽  
Visible Light ◽  
Light Emission ◽  
Multiple Quantum Well ◽  
Visible Light Communication ◽  
Multiple Quantum

High-speed real-time visible light communication system based on InGaN/GaN-base multi-quantum well blue micro-LED

2021 ◽  
Vol 17 (12) ◽  
pp. 741-745
Author(s):  
Jia Yu ◽  
Zhengjun Wei ◽  
Xiaojun Guan ◽  
Yingfang Zheng ◽  
Xiangfei Zhang ◽  
...  
Keyword(s):  
Quantum Well ◽  
Visible Light ◽  
Real Time ◽  
Communication System ◽  
High Speed ◽  
Visible Light Communication ◽  
Multi Quantum Well

scholarly journals Micro-LED as a Promising Candidate for High-Speed Visible Light Communication

2020 ◽  
Vol 10 (20) ◽  
pp. 7384
Author(s):  
Konthoujam James Singh ◽  
Yu-Ming Huang ◽  
Tanveer Ahmed ◽  
An-Chen Liu ◽  
Sung-Wen Huang Chen ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Visible Light ◽  
High Speed ◽  
Review Paper ◽  
Visible Light Communication ◽  
Low Power Consumption ◽  
Active Layer Thickness ◽  
Modulation Bandwidth ◽  
Recombination Time

Visible Light Communication (VLC) technology is an emerging technology using visible light modulation that, in the modern world, will mainly facilitate high-speed internet connectivity. VLC provides tremendous advantages compared to conventional radio frequency, such as a higher transmission rate, high bandwidth, low-power consumption, no health hazards, less interference, etc., which make it more prominent in recent days. Due to their outstanding features, including low cost, low power consumption, etc., µ-light-emitting diodes (LEDs) have gained considerable attention for VLC implementation, but mostly for the ability to be used for lighting as well as communications. In this review paper, we will focus mainly on recent developments in VLC applications and various factors affecting the modulation bandwidth of VLC devices. Numerous factors, such as quantum confined stark effect (QCSE), carrier lifetime, carrier recombination time, crystal orientation, etc. affect the modulation bandwidth of LEDs, and more information will be discussed in the following sections. This paper will focus on VLC applications based on LEDs but mainly on semipolar μ-LEDs and μ-LED-based arrays with high bandwidths. Another important application of VLC is underwater optical wireless communication (UOWC), which has drawn a huge interest in marine exploration and underwater connectivity, but still faces some challenges because visible light is being used. In addition, this paper will focus on how the current VLC system modulation bandwidth can be enhanced. Many methods have been introduced, such as decreasing the active layer thickness or effective active area or using doping, but the bandwidth is restricted by the recombination time when the system configuration reaches its limit. Therefore, it is important to find alternative ways such as optimizing the system, using the blue filter or using the equalization technology, which will be addressed later. Overall, this review paper provides a brief overview of the VLC-based system performance and some of its potential prospects.

scholarly journals Visible Light Communication System Technology Review: Devices, Architectures, and Applications

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1098
Author(s):  
Tai-Cheng Yu ◽  
Wei-Ta Huang ◽  
Wei-Bin Lee ◽  
Chi-Wai Chow ◽  
Shu-Wei Chang ◽  
...  
Keyword(s):  
Visible Light ◽  
Secure Communication ◽  
High Speed ◽  
Stark Effect ◽  
Visible Light Communication ◽  
Optimal Choice ◽  
Light Sources ◽  
Modulation Bandwidth ◽  
High Data ◽  
Wide Range

Visible light communication (VLC) is an advanced, highly developed optical wireless communication (OWC) technology that can simultaneously provide lighting and high-speed wireless data transmission. A VLC system has several key advantages: ultra-high data rate, secure communication channels, and a lack of interference from electromagnetic (EM) waves, which enable a wide range of applications. Light-emitting diodes (LEDs) have been considered the optimal choice for VLC systems since they can provide excellent illumination performance. However, the quantum confinement Stark effect (QCSE), crystal orientation, carrier lifetime, and recombination factor will influence the modulation bandwidth, and the transmission performance is severely limited. To solve the insufficient modulation bandwidth, micro-LEDs (μ-LEDs) and laser diodes (LDs) are considered as new ideal light sources. Additionally, the development of modulation technology has dramatically increased the transmission capacity of the system. The performance of the VLC system is briefly discussed in this review article, as well as some of its prospective applications in the realms of the industrial Internet of Things (IoT), vehicle communications, and underwater wireless network applications.

High-speed micro-LEDs for visible light communication: challenges and progresses

2021 ◽  
Author(s):  
Luming Yu ◽  
Lai Wang ◽  
Zhibiao Hao ◽  
Yi Luo ◽  
Changzheng Sun ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Visible Light ◽  
High Speed ◽  
Visible Light Communication ◽  
Future Research ◽  
Light Sources ◽  
Modulation Bandwidth ◽  
Existing Problems ◽  
Communication Challenges

Abstract Due to spectrum shortage, visible light communication (VLC) has gradually been regarded as an important alternative and reinforcement in wireless communication field. Micro-LEDs are ideal high-speed light sources for VLC due to its significantly improved modulation bandwidth. In this review, the developments of high-speed micro-LEDs in VLC are discussed. While expounding the unique advantages of micro-LED, we also point out the existing problems and challenges. On this basis, we review the outstanding achievements in bandwidth improvement, and also look forward to some promising directions for future research.

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