Self-powered flexible fingerprint-recognition display based on a triboelectric nanogenerator

In the time of Internet of Things (IoT), alternating current electroluminescence (ACEL) has unique advantages in the fields of smart display and human–computer interaction. However, their reliance on external high-voltage AC power supplies poses challenges in terms of wearability and limits their practical application. This paper proposed an innovative scheme for preparing a feather triboelectric nanogenerator (F-TENG) using recyclable and environmentally friendly material. The highest open-circuit voltage, short-circuit current, and transferred charge of SF₆-treated F-TENGs can reach 449 V, 63 μA, and 152 nC, which enables easy lighting of BaTiO₃-doped ACEL devices. Using a human electrical potential, a single-electrode F-TENG is combined with ACEL device for self-powered fingerprint recognition display. These works achieve self-powered flexible wearable ACEL devices, which are not only efficient and portable but also have good application prospects in the human–computer interaction, functional displays, and wearable electronic devices.