Light-insensitive organic solar-powered amplifiers

Qiang Wu, Shijie Wang, Wei Gao, Zeng Chen, Jun Tao, Xinyue Song, Sen Yan, Haiming Zhu, Ke Zhou, Long Jiang (), Xiaomin Xu (), Alex K.-Y. Jen () and Wei Ma ()
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Qiang Wu: Xi’an Jiaotong University, State Key Laboratory for Mechanical Behavior of Materials
Shijie Wang: Xi’an Jiaotong University, State Key Laboratory for Mechanical Behavior of Materials
Wei Gao: City University of Hong Kong, Department of Materials Science and Engineering
Zeng Chen: Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, Key Laboratory of Excited State Materials of Zhejiang Province, Department of Chemistry
Jun Tao: Tsinghua University, Institute of Materials Research, Shenzhen International Graduate School
Xinyue Song: Xi’an Jiaotong University, School of Information and Communications Engineering
Sen Yan: Xi’an Jiaotong University, School of Information and Communications Engineering
Haiming Zhu: Zhejiang University, State Key Laboratory of Modern Optical Instrumentation, Key Laboratory of Excited State Materials of Zhejiang Province, Department of Chemistry
Ke Zhou: Xi’an Jiaotong University, State Key Laboratory for Mechanical Behavior of Materials
Long Jiang: State Key Laboratory of Oil and Gas Equipment, CNPC Tubular Goods Research Institute
Xiaomin Xu: Tsinghua University, Institute of Materials Research, Shenzhen International Graduate School
Alex K.-Y. Jen: City University of Hong Kong, Department of Materials Science and Engineering
Wei Ma: Xi’an Jiaotong University, State Key Laboratory for Mechanical Behavior of Materials

Nature Communications, 2025, vol. 16, issue 1, 1-13

Abstract: Abstract Wearable bio-sensors using organic electrochemical transistors (OECTs) powered by flexible organic solar cells (OSCs) show promise for electrophysiological monitoring. However, single OECT bio-sensors face unstable outputs due to the limitations of OSCs under low-light conditions and poor energy autonomy. Here, we show a low-power self-powered physiological sensor employing a dual-OECTs configuration, connected in series and powered by the optimized OSCs, which shows more stable signal output and faster response compared to single OECT bio-sensors. Our devices employ the efficient and more stable OSCs to power amplifier by suppressing charge recombination and improving flexibility, thereby facilitating long-term, on-demand use. This integrated device can be attached to human-skin to stably monitor signals, including electrocardiograms, electromyograms and electrooculograms across a wide range of illumination intensities (500 lux-50,000 lux). The design offers a simple architecture for wearable low-power self-powered bio-sensors without external energy supplies/storage, highlighting their potential in real-time disease diagnosis and prevention scenarios.

Date: 2025
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DOI: 10.1038/s41467-025-65640-z

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