ElFys, Inc. is a pioneering semiconductor and nanotechnology manufacturer that designs next-generation photodetectors utilizing proprietary Black Silicon Induced Junction technology. Founded in 2017 as a spin-off from Aalto University, the company has broken fundamental physical barriers in photosensitivity, achieving near 100% external quantum efficiency across the ultraviolet (UV), visible (VIS), and near-infrared (NIR) spectrums. ElFys’ detectors provide up to 50% higher sensitivity than traditional technologies, exceptionally low dark current, and ultra-wide sensing angles. Their mission-critical sensor modules are widely deployed in medical wearables (PPG sensors), analytical spectroscopy instrumentation, X-ray imaging, and elite space and defense applications. Our detectors offer up to 50% higher sensitivity than traditional technologies, combined with low dark current, ultra-wide sensing angles (up to 60°), and fast response times. We provide standard products—including the QPD (4-Quadrant), SM (Surface Mount), and PD product lines—as well as customized solutions for mission-critical applications.ElFys’ technology is utilized globally in space and defense, wearable health monitoring (e.g., PPG sensors), analytical instrumentation, and spectroscopy. We are a trusted partner for organizations such as the European Space Agency (ESA) and are active participants in defense innovation programs like NATO DIANA.