Electret-mediated large-area organic single crystals for neuromorphic polarization vision beyond intrinsic discrimination limits

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ID: 330792
2026
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Abstract
Abstract Biological polarization vision extracts optical information inaccessible to conventional intensity-based imaging, offering a powerful paradigm for next-generation machine vision. However, simultaneously achieving large-area manufacturability, high polarization discrimination, and neuromorphic functionality remains challenging within a single organic material platform. Here we report an electret-mediated biphasic dip-coating strategy that enables scalable integration of ultrathin organic single crystals with an in-situ electret layer for neuromorphic polarization vision. In this design, polyvinyl alcohol (PVA) serves as a dual-functional mediator: its amphiphilic structure regulates interfacial nucleation and mass transport to direct the continuous growth of highly oriented few-layer single crystals, while its hydroxyl-rich framework provides homogeneous electron trapping sites. The resulting uniformly anisotropic single-crystal coupled electret facilitates robust polarization-dependent charge trapping, boosting the dichroic ratio (DR) above 103 while delivering a low DR coefficient of variation (CV) of 7.3%. Furthermore, pronounced synaptic properties were achieved, featuring an exceptionally paired-pulse facilitation (PPF) index of 6594%, a photocurrent modulation range exceeding 105, and an ultralow energy consumption of ~1 aJ per synaptic event. By unifying scalable single-crystal growth with polarization discrimination and synaptic plasticity, this work advances organic semiconductors toward integrated neuromorphic polarization vision.
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Authors Xianshuo Wu, Changsong Gao, Shihan Zhang, Lingjie Sun, Yiwen Ren, Li Pang, Zefei Zheng, Xinghan Meng, Suhao Hu, Rongjin Li, Wei Deng, Qiang Zhao, Zhongwu Wang, Fangxu Yang, Wenping Hu
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Journal national science review
Year 2026
DOI
10.1093/nsr/nwag625
URL
https://doi.org/10.1093/nsr/nwag625
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