Chelated tin halide perovskite for near-infrared neuromorphic imaging array enabling object recognition and motion...

Area of Science:

• Materials Science
• Neuroscience
• Optoelectronics

Background:

• Neuromorphic imaging arrays integrate sensing, memory, and processing for efficient spatiotemporal fusion.
• Halide perovskites show promise for neuromorphic imaging but face limitations like lead toxicity and narrow response ranges.
• Developing lead-free, stable, and efficient materials is crucial for advancing neuromorphic imaging.

Purpose of the Study:

• To create lead-free, non-toxic perovskite materials for neuromorphic imaging applications.
• To enhance optoelectronic properties and near-infrared response for better sensing capabilities.
• To demonstrate a functional neuromorphic imaging array for object and motion recognition.

Main Methods:

• Synthesized lead-free formamidinium tin triiodide perovskites functionalized with quercetin molecules using a multi-site chelate strategy.
• Employed a non-equilibrium photogenerated carrier strategy to optimize synaptic functionalities.
• Constructed a 12x12 real-time neuromorphic near-infrared imaging array on thin-film transistor backplanes.

Main Results:

• Achieved favorable near-infrared response and optoelectronic properties with the novel perovskite material.
• Demonstrated key synaptic features including quasi-linear photocurrent generation, prolonged decay, high stability, and low energy consumption.
• Successfully implemented a 12x12 array enabling hardware-level spatiotemporal fusion for robust recognition.

Conclusions:

• The developed formamidinium tin triiodide-quercetin perovskite is a promising lead-free material for neuromorphic imaging.
• The neuromorphic imaging array exhibits excellent performance for object recognition and motion perception in complex environments.
• This work advances the development of intelligent autonomous and surveillance systems.