期刊
LIGHT-SCIENCE & APPLICATIONS
卷 9, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41377-020-0314-z
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资金
- EPSRC [EP/P006280/1]
- National Centre for Research and Development, Poland [PL-TWIII/17/2016]
- National Science Centre, Poland [HARMONIA 2016/22/M/ST5/00431]
- Royal Society Wolfson Foundation Research Merit Award
- EPSRC [EP/P007767/1, EP/P006280/1] Funding Source: UKRI
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.
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