Ultraviolet Optoelectronic Synapse Based on AlScN/p‐i‐n GaN Heterojunction for Advanced Artificial Vision Systems

Ferroelectric materials represent a frontier in semiconductor research, offering the potential for novel optoelectronics. AlScN material is a kind of outstanding ferroelectric semiconductor with strong residual polarization, high Curie temperature, and mainstream semiconductor fabrication compatibil...

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Published in:Advanced materials (Weinheim) Vol. 37; no. 19; pp. e2419316 - n/a
Main Authors: Xie, Zhiwei, Jiang, Ke, Zhang, Shanli, Wang, Zhongqiang, Shan, Xuanyu, Wang, Bingxiang, Ben, Jianwei, Liu, Mingrui, Lv, Shunpeng, Chen, Yang, Jia, Yuping, Sun, Xiaojuan, Li, Dabing
Format: Journal Article
Language:English
Published: Germany Wiley Subscription Services, Inc 01.05.2025
Subjects:
AlScN
Artificial vision
Curie temperature
Ferroelectric materials
Ferroelectricity
Gallium nitrides
Heterojunctions
image sensing and preprocessing
in‐memory computing
memristor
Optoelectronics
Semiconductor research
ultraviolet optoelectronic synapse
Vision systems
in‐memory computing
AlScN
ultraviolet optoelectronic synapse
image sensing and preprocessing
memristor
ISSN:0935-9648, 1521-4095, 1521-4095
Online Access:Get full text
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Summary:Ferroelectric materials represent a frontier in semiconductor research, offering the potential for novel optoelectronics. AlScN material is a kind of outstanding ferroelectric semiconductor with strong residual polarization, high Curie temperature, and mainstream semiconductor fabrication compatibility. However, it is challenging to realize multi‐state optical responders due to their limited light sensitivity. Here, a two‐terminal AlScN/p‐i‐n GaN heterojunction ultraviolet optoelectronic synapse is fabricated, overcoming this limitation by leveraging hole capture at the AlScN/p‐GaN hetero‐interface for multi‐state modulation. The novel structure maintains excellent memristor characteristics based on the ferroelectric of AlScN, realizing an on/off ratio of 9.36 × 105. More importantly, the device can mimic synaptic characteristics essential for artificial vision systems, achieving an image recognition accuracy of 93.7% with a weight evolution nonlinearity of 0.26. This approach not only extends the applications of AlScN in optoelectronics but also paves the way for advanced artificial vision systems with image preprocessing and recognition capabilities. The findings provide a step forward in the development of non‐volatile memories with potential for on‐chip sensing and computing. Researchers have developed a two‐terminal AlScN/p‐i‐n GaN heterojunction ferroelectric memristor with ultraviolet photoelectric synapse function, enabling nonvolatile memory and optoelectronic synaptic characteristics. This innovation achieves a high memory on/off ratio and a relatively low synaptic energy consumption, advancing optoelectronics and artificial vision systems with potential applications in on‐chip sensing and computing.
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ISSN:0935-9648
1521-4095
1521-4095
DOI:10.1002/adma.202419316