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Lookup NU author(s): Dr Paul HaighORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
© 2020, The Author(s).Visible light communication (VLC) is a wireless technology that relies on optical intensity modulation and is potentially a game changer for internet-of-things (IoT) connectivity. However, VLC is hindered by the low penetration depth of visible light in non-transparent media. One solution is to extend operation into the “nearly (in)visible” near-infrared (NIR, 700–1000 nm) region, thus also enabling VLC in photonic bio-applications, considering the biological tissue NIR semitransparency, while conveniently retaining vestigial red emission to help check the link operativity by simple eye inspection. Here, we report new far-red/NIR organic light-emitting diodes (OLEDs) with a 650–800 nm emission range and external quantum efficiencies among the highest reported in this spectral range (>2.7%, with maximum radiance and luminance of 3.5 mW/cm2 and 260 cd/m2, respectively). With these OLEDs, we then demonstrate a “real-time” VLC setup achieving a data rate of 2.2 Mb/s, which satisfies the requirements for IoT and biosensing applications. These are the highest rates ever reported for an online unequalised VLC link based on solution-processed OLEDs.
Author(s): Minotto A, Haigh PA, Lukasiewicz LG, Lunedei E, Gryko DT, Darwazeh I, Cacialli F
Publication type: Article
Publication status: Published
Journal: Light: Science and Applications
Print publication date: 01/12/2020
Online publication date: 26/04/2020
Acceptance date: 10/04/2020
Date deposited: 28/05/2020
ISSN (print): 2095-5545
ISSN (electronic): 2047-7538
Publisher: Springer Nature
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