Organic-Inorganic Hybrid Thin-film Photo-detector for Fingerprint Recognition

摘要

A near-IR based optical type fingerprint sensor is designed and implemented. The driving system is based on the passive pixel sensor (PPS) array with Oxide (IGZO) TFT technology. The sensing element of the optical sensor is composed of the organic photosensitive diode (OPD) exhibited typical sandwich structure. Clear fingerprint images can be successfully captured by such organic-inorganic hybrid thin-film photo-detector. Further, flexible fingerprint sensor is also realized based on PI substrate.