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Split-Ring Structured All-Inorganic Perovskite Photodetector Arrays for Human-Machine Interaction

Bori Shi¹, Jinbo Wu^1,2,*

1 Materials Genome Institute, Shanghai University, Shanghai, 200444, China
2 Faculty of Materials Science, Shenzhen MSU-BIT University, Shenzhen, China

* Corresponding Author: Jinbo Wu. Email:

The International Conference on Computational & Experimental Engineering and Sciences 2024, 29(1), 1-1. https://doi.org/10.32604/icces.2024.010900

Abstract

Photodetectors with long detection distances and fast responses are important media in constructing a non-contact human-machine interface for the human-machine interaction. All-inorganic perovskite have excellent optoelectronic performance with high moisture and oxygen resistance, making them one of the promising candidates for high-performance photodetectors, but a simple, low-cost and reliable fabrication technology is urgently needed. Here, a dual-function laser etching method is developed to complete both the lyophilic split-ring structure and electrode patterning. This novel split-ring structure can capture the perovskite precursor droplet efficiently and achieve the uniform and compact deposition of CsPbBr3 films. Furthermore, our devices based on laterally conducting split-ring structured photodetectors possess outstanding performance, including the maximum responsivity of 1.44×10⁵ mA/W, a response time of 150 μs in 1.5 kHz and one-unit area < 4×10^-2 mm². Based on these split-ring photodetectors array, we realized three-dimensional gesture detection with up to 100 mm distance detection and up to 600 mm/s speed detection, for low-cost, integrative, and non-contact human-machine interfaces. Finally, we applied this device to wearable and flexible digital gesture recognition watch panel, safe and comfortable central control integrated on the car screen, and remote control of the robot, demonstrating the broad potential applications.

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Keywords

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