A Self-Powered Organic Vision Sensor Array for Photopic Adaptation

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

With the rapid development of artificial intelligence, it is essential to develop a bionic vision sensor that boasts low power consumption, self-adaptability, and broadband sensing for efficient image preprocessing. We employed an organic p-type semiconductor, poly(3-hexylthiophene-2,5-diyl) (P3HT), in conjunction with Al electrode engineer Schottky junction. This design leverages photogating effect due charge trapping by defects at P3HT/Al interface, endowing this self-powered, two-terminal device photopic adaptability. The 1.9 eV bandgap P3HT enables substantial light absorption within visible spectrum, yielding significant photocurrent. By assembling 50 photoelectric sensors into 10 × 5 array, we successfully demonstrated formation process emulates adaptation, specifically recognizing letters. easily fabricated, self-powered retinomorphic has great potential mimic retinal structures, thereby heralding new frontier visual sensory devices.

Language: Английский

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Dual‐Mode ZnO/SnSe Heterojunction Devices with Integrated Bipolar Response Photodetectors and Artificial Optoelectronic Synapses for in‐Sensor Computing

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract Optoelectronic synapse devices (OESDs) inspired by human visual systems enable to integration of light sensing, memory, and computing functions, greatly promoting the development in‐sensor techniques. Herein, dual‐mode bipolar response photodetectors (PDs) artificial optoelectronic synapses based on ZnO/SnSe heterojunctions are presented. The function fabricated device can be converted between PDs OESDs modulating intensity. As a PD, polarity output current switched tuning laser wavelength intensity, which is attributed competition photovoltaic photothermoelectric effects in heterojunction. an OESD, exhibits versatile photonic synaptic characteristics at low intensity defect‐dominant carrier trapping/de‐trapping processes, including short/long‐term plasticity learning experience behaviors. More importantly, benefitting from outstanding responses, logic functions “AND” “OR” implemented through architecture. This work supplies novel route realize complex functionality one offers effective strategies for developing computing.

Language: Английский

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2D Perovskite Oxides toward High-Performance Ultraviolet Photodetection

Accounts of Materials Research, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Structural and functional properties of BiFeO3/CuCrO2 nanocomposites for next-generation photosensors

Materials Science in Semiconductor Processing, Journal Year: 2025, Volume and Issue: 194, P. 109547 - 109547

Published: April 9, 2025

Language: Английский

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