Mixed quantum-dot neuromorphic vision sensors for broad spectral perception

초록

Neuromorphic vision sensors aim to replicate the human visual system by transforming light into electrical signals. However, achieving color discrimination remains a challenge. Colloidal quantum dots (QDs) are being investigated as photoactive materials for artificial synaptic applications. QD-based phototransistors have shown promise for their versatile photo-synaptic memory behaviors and neuromorphic image processing capabilities. This study proposes incorporating a mixed-QD system of different sizes within a single device to improve color identification and spatiotemporal resolution. An amorphous In-Ga-Zn-O (IGZO) thin-film transistor amplifies the signals, and a heterojunction between absorption and channel layers achieves synaptic function by storing charges, enabling the device to recognize and distinguish light signals of varying wavelengths and intensities. © 2023 SPIE.

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