A survey on Li-Fi technology

Kulkarni, Shivaji; Darekar, Amogh; Joshi, Pavan

doi:10.1109/wispnet.2016.7566413

Cited by 24 publications

(10 citation statements)

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“…After signal conditioning (amplification, processing and retrieval of binary data) data is fed in to a laptop or other web empowered gadgets. (Kulkarni et al, 2016).…”

Section: How Li-fi Workmentioning

confidence: 99%

“…The growing data requirements for domestic use (Kulkarni et al, 2016;Singh et al, 2017), have led to the suggestion that hybrid Li-Fi and Wi-Fi networks be used exploiting both the wide bandwidth of visible light spectrum and radio frequency transmission diffraction potential [21]. This chapter therefore discusses various architectural structures of the Hybrid Li-Fi / Wi-Fi network communication.…”

Section: Hybrid Li-fi and Wi-fi System Modelsmentioning

confidence: 99%

“…It falls under the category of optical wireless communications (Zhu et al, 2015). Li-Fi uses LED transceiver lamps that can be used to provide light for a room, and transmit and receive information (Kulkarni et al, 2016). The LED light power changes and based on this variation, communication occurs digitally.…”

Section: Introductionmentioning

confidence: 99%

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Survey on Li-Fi communication networks and deployment

Mongwewarona¹

2020

Afr J Eng Res

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Light Fidelity (Li-Fi) is a technology in the field of Visible Light Communications (VLC) that renders transmission of data via illumination by sending data through a Light Emitting Diode (LED) light bulb. This technology uses a photo-detector to receive light signals and a signal processing element to change over the information into a stream-capable substance. Out of this survey paper, we see that Li-Fi technology execution and research has been carried out in patient monitoring systems, vehicle toll gate systems, under roof blind navigation systems and other applications. Limited research has been carried out on Li-Fi communication networks and deployment. Nonetheless, there is a lot of potential to implement it. This includes many applications in sensitive electromagnetic interference environments such as air crafts and power plants where Wireless Fidelity (Wi-Fi) is not suitable but fast and interconnected data systems are still required. Li-Fi has potential in areas where secure networks are required and where there is need to track signal availability and transmission radius as in banks and intelligence gatherings like in the military and government special operations. It can also provide high data capacity in heavily populated environments such as colleges, malls and conference centers. There are still unattended scopes like Li-Fi network integration with the mobile network and the optical fiber network. No guidelines have been developed for the efficient deployment of Li-Fi networks to suit different applications such as hospitals, clinics and banks.

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“…After signal conditioning (amplification, processing and retrieval of binary data) data is fed in to a laptop or other web empowered gadgets. (Kulkarni et al, 2016).…”

Section: How Li-fi Workmentioning

confidence: 99%

Section: Hybrid Li-fi and Wi-fi System Modelsmentioning

confidence: 99%

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Survey on Li-Fi communication networks and deployment

Mongwewarona¹

2020

Afr J Eng Res

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“…LEDs provide efficient solid-state lighting for homes, businesses, and display technology [1][2][3][4]. LEDs are also poised to be utilized in ever expanding applications such as visible light communication and LiFi [5][6]. Conventional LEDs utilized for these applications are based on GaN, which is a wide bandgap semiconductor.…”

Section: Introductionmentioning

confidence: 99%

450 nm Gallium Nitride Alternating Current Light-Emitting Diode

et al. 2020

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Gallium Nitride (GaN) based light-emitting diodes (LEDs) are being utilized in an ever expanding number of applications. The persistent issues, however, have been the use of alternating current (AC) to direct current (DC) converters and the inefficient p-type doping compared to n-type doping. Here, a novel hybrid AC InGaN quantum well (QW) LED without a p-GaN layer is demonstrated at 450 nm. A tunneling LED is fabricated through use of InGaN QWs, combined with a thin Al2O3 dielectric with NiO as the source of the holes. This hybrid InGaN LED utilizes Fowler-Nordheim tunneling and band bending in order to inject holes into the active region. Due to the symmetric nature of the tunneling, hole or electron injection through the top oxide layer leads to AC performance. Room temperature and cryogenic I-V measurements are performed to evaluate the tunneling mechanism. Tunneling of holes is found to lead to earlier device turn-on of ~0.5 V compared with conventional blue LEDs at ~2 V. The presented work can lead to a number of novel applications such as on-chip communication, monolithic integration with transistors, and LiFi.

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“…LEDs based on GaN materials provide efficient lighting for a variety of applications including display technologies [1]- [4], commercial lighting [5]- [7], and emerging applications such as visible light communication [8], [9]. However, these wide bandgap semiconductors suffer from poor p-type dopant activation at room temperature, due to activation energies of 170 meV [10].…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Field Effect Light-Emitting Diode

2020

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Gallium Nitride (GaN) based light-emitting diodes (LEDs) suffer from the persistent issue of high resistivity of the p-type layer, due to inefficient dopant activation at room temperature. Here, a novel Electrostatic Field Effect LED (EFELED) is demonstrated to solve this issue by introducing significantly more holes into the LED active region for the first time. An increase in drive current is observed through application of positive biases to a capacitor layer on top of a 436 nm InGaN/GaN LED. With a positive bias of 5 V applied to the capacitor, the EFELED showed more than a twofold increase in optical output from electroluminescence (EL) measurements, as well as over 115% enhanced external quantum efficiency (EQE). Modulation of holes can also be achieved through the novel capacitor integration in the EFELED, which leads to light output control. This proposed EFELED provides an alternative method to efficiently improve hole injection for the active region through energy band bending, which addresses the fundamental p-type doping issue for LED devices.

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A survey on Li-Fi technology

Cited by 24 publications

References 0 publications

Survey on Li-Fi communication networks and deployment

Survey on Li-Fi communication networks and deployment

450 nm Gallium Nitride Alternating Current Light-Emitting Diode

Electrostatic Field Effect Light-Emitting Diode

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