SrTiO3/CuNi‐Heterostructure‐Based Thermopile for Sensitive Human Radiation Detection and Noncontact Human–Machine Interaction

• DOI: 10.1002/adma.202204355
• Publication Date: 2022-07-12T00:40:20Z
• Authors: Xiaohan Guo; Xiaowei Lu; Peng Jiang; Xinhe Bao
• Keywords: Thermopile; Photodetection

Noncontact interactive technology provides an intelligent solution to mitigate public health risks from cross-infection in the era of COVID-19. The utilization human radiation as a stimulus source is conducive implementation low-power, robust noncontact human-machine interaction. However, low intensity emitted by humans puts forward high demand for photodetection performance. Here, SrTiO3-x /CuNi-heterostructure-based thermopile constructed, which features combination thermoelectric performance and near-unity long-wave infrared absorption, realize self-powered detection radiation. response level this orders magnitude higher than those low-dimensional-materials-based photothermoelectric detectors even commercial thermopiles. Furthermore, touchless input device based on array developed, can recognize hand gestures, numbers, letters real-time. This work offers reliable strategy integrate spontaneous into interaction systems.