Vein detection with near‐infrared organic photodetectors for biometric authentication
Daniel Tordera, Bart Peeters, Ezequiel Delvitto, Santhosh Shanmugam, Joris Maas, Joris de Riet, Roy Verbeek, Robert van de Laar, Thijs Bel, Gerard de Haas, Leslye Ugalde, Albert J. J. M. van Breemen, Ilias Katsouras, Auke Jisk Kronemeijer, Hylke B. Akkerman, Eric A. Meulenkamp, Gerwin H. Gelinck
Abstract
Abstract We combine a low dark current and high‐detectivity near‐infrared (NIR)‐sensitive organic photodetector with a high‐resolution 508 pixels per inch (ppi) oxide thin‐film transistor (TFT) backplane to create a large‐area thin NIR detector, using processes that are compatible with flat‐panel display fabrication. The detector is characterized showing high uniformity and linearity. With the use of a NIR light source, the detector is capable of imaging the (pattern of) veins under the skin in reflection, leading to improved biometric authentication.