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Prof. Daniel Gryko in collaboration with Prof. Franco Caciallim (London Center for Nanotechnology) developed new OLED diodes that emit far-red/NIR light with an emission range of 650-800 nm. Such OLEDs are made of organic compounds and used as a surface light source. They are used to build flexible displays, TV sets or other portable devices. Displays manufactured in OLED technology are extremely thin as they need no backlighting because the diodes themselves generate light. A key achievement of the research team was the development of very high-efficiency OLED diodes with very high external quantum efficiency in the spectral range 650–800 nm (> 2.7%) and an illumination of 3.5 mW/cm2, respectively. Thanks to this, scientists were able to achieve a record data transfer rate of ≈2.2 Mb/s, which meets the requirements for the so-called Internet of Things and biosensor applications. The research results are described in the journal Light Science and Applications, which belongs to the Nature Publishing Group. This is only the second publication with a Polish affiliation to be published in this magazine since its foundation in 2012.
Visible light communication (VLC) is a wireless technology that relies on an optical intensity modulation and is considered a key tool for communication within the so-called Internet-of-Things (IoT). However, VLC is hampered by the low depth of visible light penetration on opaque surfaces. One solution is to extend the operation to near-infrared (NIR, 700–1000 nm), thus enabling the use of VLC in photonic bioapplications, taking into account the NIR-translucency of biological tissues.
Link to the article: https://www.nature.com/articles/s41377-020-0314-z