Indoor visible light communications, networking, and applications

Lian, Jie; Vatansever, Zafer; Noshad, Mohammad; Brandt-Pearce, Maïté

doi:10.1088/2515-7647/aaf74a

Cited by 44 publications

(34 citation statements)

References 97 publications

(117 reference statements)

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“…In order to match the required benchmarks of these technologies, the detector characteristics need to be tailored to the final application in terms of optoelectronic performance and device design. This is particularly relevant to upcoming technologies such as visible light communication (VLC) which aims to provide indoor navigation in buildings, direct and secure optical data links as well as high‐speed communication by using ambient lighting to transmit data 3,4. In the scope of multichannel communication, high requirements in terms of spectral selectivity should be met in addition to a fabrication route compatible with future mobile and wearable devices based on lightweight and flexible electronics.…”

Section: Figurementioning

confidence: 99%

“…This is particularly relevant to upcoming technologies such as visible light communication (VLC) which aims to provide indoor navigation in buildings, direct and secure optical data links as well as high-speed communication by using ambient lighting to transmit data. [3,4] In the scope of multichannel communication, high requirements in terms of spectral selectivity should be met in addition to a fabrication route compatible with future mobile and wearable devices based on lightweight and flexible electronics. Organic photodiodes (OPDs) are particularly well suited for this purpose since the synthetic flexibility of the materials can be exploited to tailor a specific device figure of merit such as their spectral selectivity.…”

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confidence: 99%

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Color‐Selective Printed Organic Photodiodes for Filterless Multichannel Visible Light Communication

et al. 2020

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Future lightweight, flexible, and wearable electronics will employ visible‐light‐communication schemes to interact within indoor environments. Organic photodiodes are particularly well suited for such technologies as they enable chemically tailored optoelectronic performance and fabrication by printing techniques on thin and flexible substrates. However, previous methods have failed to address versatile functionality regarding wavelength selectivity without increasing fabrication complexity. This work introduces a general solution for printing wavelength‐selective bulk‐heterojunction photodetectors through engineering of the ink formulation. Nonfullerene acceptors are incorporated in a transparent polymer donor matrix to narrow and tune the response in the visible range without optical filters or light‐management techniques. This approach effectively decouples the optical response from the viscoelastic ink properties, simplifying process development. A thorough morphological and spectroscopic investigation finds excellent charge‐carrier dynamics enabling state‐of‐the‐art responsivities >102 mA W−1 and cutoff frequencies >1.5 MHz. Finally, the color selectivity and high performance are demonstrated in a filterless visible‐light‐communication system capable of demultiplexing intermixed optical signals.

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Section: Figurementioning

confidence: 99%

mentioning

confidence: 99%

Color‐Selective Printed Organic Photodiodes for Filterless Multichannel Visible Light Communication

et al. 2020

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“…The limitations of existing literature reviews in this regard are addressed in this paper. Afzalan and Jazizadeh (2019); Kumar and Singh (2019); Matheus et al (2019); Udvary (2019); Vappangi and Mani (2019); Zafar, Karunatilaka, and Parthiban (2015); Wu, Wang, and Youn (2014); Sharma et al (2018); Pathak et al (2015); Ndjiongue and Ferreira (2018); Medina, Zambrano, and Navarro (2015); Mathews et al (2017); Luo, Fan, and Li (2017); Lian et al (2019); Khan (2017); Karunatilaka et al (2015); Jovicic, Li, and Richardson (2013); Ji et al (2018); Hassan et al (2015); Burchardt et al (2014); Haas et al (2016); Elgala, Mesleh, and Haas (2011); Cevik and Yilmaz (2015)…”

Section: Insights From Previous Literature Reviewsmentioning

confidence: 99%

“…Visible light technology can eliminate the capacity bottleneck of radio-based wireless networks due to a 10,000 times greater spectrum than radio techniques (Koonen 2018;Ji et al 2018). Based on new technical developments of LEDs that allow high-speed pulsation without considerable effects on lighting output and without being visible to the human eye, VLC opens up new potentials as an OWC technology (Lian et al 2019). A VLC system consists of two parts: transmitter and receiver.…”

Section: Visible Light Communication (Vlc)mentioning

confidence: 99%

“…Therefore, this technology has attracted great research interest in recent years and gained popularity both as a substitute and a complement for radiofrequency (RF) communication systems (Koonen 2017;Ji et al 2018). VLC uses and extends the existing SLS infrastructure and is therefore often used as a dual system for illumination and communication (Lian et al 2019). In contrast to comparable wireless technologies, VLC can also be used in places where wireless connectivity is disrupted; it does not emit radiation and cannot penetrate walls or other obstacles (Pathak et al 2015;O'Brien et al 2008).…”

Section: Visible Light Communication (Vlc)mentioning

confidence: 99%

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Smart lighting systems: state-of-the-art and potential applications in warehouse order picking

Füchtenhans

Grosse

Glock

2021

International Journal of Production Research

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Artificial lighting is a constant companion in everyday private and working life, influencing visibility in interior spaces as well as outdoors. In recent years, new technical solutions have extended traditional lighting systems to become 'smart'. Different types of smart lighting systems are available on the market today, and researchers have concentrated on analysing their usability and efficiency, especially for private households, office buildings and public streets. This paper presents a systematic literature review to analyse the state-of-knowledge of technologies and applications for smart lighting systems. The results of the review show that smart lighting systems have been frequently discussed in the literature, but that their potentials in industrial environments, such as production and logistics, has rarely been addressed in the literature so far. Lighting systems for industrial environments often have very different requirements depending on the working environment and operating conditions. Based on the results of the literature review, this paper contributes to closing this research gap by discussing the usage potential of smart lighting systems to improve the efficiency of warehouse order picking, which is an application that may benefit from various functions smart lighting systems provide. Several propositions are developed that emphasise research opportunities and managerial implications in this context.

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Wettability‐Assisted Process to Shape Organic Crystalline Printed Films

Sequeira

Martins

Vilarinho

et al. 2022

Adv Materials Inter

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In particular, the ease of fabrication of the active parts of these devices following solution-processing routes, such as inkjet printing, can deliver polycrystalline smooth films, with precise control over the dispensed volume. [10] Critical aspects in developing a printable device include the quality of the materials, the solution formulation, viscosity control, surface wetting to avoid solution dispersion, or long-term stability. [11,12] Specifically, viscosity is not only important for the film quality but also determines the printing technique [13] and can be divided into two main types, low viscosity or high viscosity solutions. Typically, volatile solutions do not use binders, surfactants, or other chemical additives and offer higher-purity materials. [14] However, these can affect film morphology and topography, creating the well-known "coffee-ring" effect. [15] It also presents an increased spread area with limited control of defined structures and has difficulties in controlling crystal nucleation and molecular aggregation, leading to defects, uneven thickness, and inferior device performance. [16] In this case, large and aligned crystalline domains are highly important, as they offer low charge transport anisotropy and low density of grain boundaries leading to higher optical-to-electrical conversion. [17,18] Strategies using solution-processing techniques have enabled high crystallinity organic semiconductor films. [19] However, these approaches present little or even no control on both the shape and size of the active semiconductorThe controlled growth of organic crystalline materials in predefined locations still poses a challenge for functional device application such as phototransistors, photoconductors, or photovoltaic solar cells. This work evidences the use of optical lithography and a fluoroalkylsilane to selectively modify the surface energy and how to create a wettability micro-patterned structure. These are then combined with non-contact printing of the organic solution providing custom-shaped films. To deliver printed films with improved morphological quality, key process parameters for high-performance organic materials are optimized. Particular attention is given to the adjustment of the concentration and solvent mixture to tune the jetting properties, and consequently, slow down the evaporation rate. Continuous films are obtained for an optimized number of droplets and spacing between them. Micro-Raman spectroscopy imaging confirms the crystalline nature of the printed films and the lack of impurities. To validate the method, rubrene and triisopropylsilylethynyl (TIPS)-pentacene are tested using two-terminal optoelectronic devices. TIPS-pentacene rectangular printed micrometric photosensor presents linear behavior and no hysteresis, reaching 0.33 nA under 18.1 mW cm −2 . The structural and optoelectronic characterization is in line with other micro-patterned examples, opening doors for new industrial applications.

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Indoor visible light communications, networking, and applications

Cited by 44 publications

References 97 publications

Color‐Selective Printed Organic Photodiodes for Filterless Multichannel Visible Light Communication

Color‐Selective Printed Organic Photodiodes for Filterless Multichannel Visible Light Communication

Smart lighting systems: state-of-the-art and potential applications in warehouse order picking

Wettability‐Assisted Process to Shape Organic Crystalline Printed Films

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