journal article·2025-01Open access

Bidirectional Photovoltage‐Driven Oxide Transistors for Neuromorphic Visual Sensors

Chenxing Jin, Jingwen Wang, Shenglan Yang, Yang Ding, Jianhui Chang, Wanrong Liu, Yunchao Xu, Xiaofang Shi, Pengshan Xie, Johnny C. Ho, Changjin Wan, Zijian Zheng, Jia Sun, Lei Liao, Junliang Yang

Advanced Materials· Volume 37· Issue 1

Abstract

Abstract Biological vision is one of the most important parts of the human perception system. However, emulating biological visuals is challenging because it requires complementary photoexcitation and photoinhibition. Here, the study presents a bidirectional photovoltage‐driven neuromorphic visual sensor (BPNVS) that is constructed by monolithically integrating two perovskite solar cells (PSCs) with dual‐gate ion‐gel‐gated oxide transistors. PSCs act as photoreceptors, converting external visual stimuli into electrical signals, whereas oxide transistors generate neuromorphic signal outputs that can be adjusted to produce positive and negative photoresponses. This device mimics the human vision system's ability to recognize colored and color‐mixed patterns. The device achieves a static color recognition accuracy of 96% by utilizing the reservoir computing system for feature extraction. The BPNVS mem‐reservoir chip is also proposed for handing object movement and dynamic color recognition. This work is a significant step forward in neuromorphic sensing and complex pattern recognition.
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Research context

OpenAlex topics: Advanced Memory and Neural Computing · Perovskite Materials and Applications · Photoreceptor and optogenetics research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hunan Key Laboratory for Super Microstructure and Ultrafast Process School of Physics Central South University Changsha Hunan 410083 P. R. China

State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical Engineering Central South University Changsha Hunan 410083 P. R. China

State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information Technology 865 Changning Road Shanghai 200050 P. R. China

Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong SAR 999077 P. R. China

School of Electronic Science & Engineering and Collaborative Innovation Centre of Advanced Microstructures Nanjing University Nanjing Jiangsu 210093 P. R. China

Department of Applied Biology and Chemical Technology Faculty of Science The Hong Kong Polytechnic University Hong Kong SRA 999077 P. R. China

State Key Laboratory for Chemo/Biosensing and Chemometrics College of Semiconductors (College of Integrated Circuits) Hunan University Changsha 410082 P. R. China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for Central Universities of the Central South University · National Key Research and Development Program of China

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