Printed 1d Perovskite Photodetector for Indoor/Outdoor Non‐Contact and Real‐Time Sports Training Monitoring

Abstract

Abstract As people increased emphasis on health problems, various wearable electronic devices are developed for sport‐related activity monitoring. However, these reported sensors must be tightly attached on the body to record the photonic, electronic even chemical changes during exercise. Poor user experience hinders the rapid application of wearable sensors. Here, an all‐printed perovskite photodetector for achieving non‐contact sports motion monitoring is developed. 1D MAPbBr3 arrays are printed with uniform orientation and strict crystallization via the droplet‐manipulation printing strategy. Under the guidance of microarrays on the template, the perovskite‐loaded droplet can be self‐shaped into the linear confined liquid space for the next crystallization. 1D perovskite photodetectors with high responsivity (R, MAX: 198 A W−1) and detectivity (D*, MAX: 6.64 × 1013 Jones) can be utilized to detect changes in the ambient light intensity under the body during the push‐up movement, achieving non‐contact real‐time monitoring of motions. The average accuracy of printed photodetectors to classify the collected push‐up signals reaches 97.40%. This strategy provides a reference for further improving the sensing performance of wearable sensors, which also extends the application of sports monitoring.

Keywords

• 1D perovskite
• photodetectors
• printing
• shadow variation
• sports monitoring