香港六合彩

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 鈥渘early (in)visible鈥� near-infrared (NIR, 700鈥�1000鈥塶m) 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鈥�800鈥塶m emission range and external quantum efficiencies among the highest reported in this spectral range (>2.7%, with maximum radiance and luminance of 3.5鈥塵W/cm²聽and 260鈥塩d/m², respectively). With these OLEDs, we then demonstrate a 鈥�real-time鈥� VLC setup achieving a data rate of 2.2鈥塎b/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.