High-Current-Density Organic Electrochemical Diodes Enabled by Asymmetric Active Layer Design,Advanced Materials

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High-Current-Density Organic Electrochemical Diodes Enabled by Asymmetric Active Layer Design
Advanced Materials ( IF 27.4 ) Pub Date : 2021-12-01 , DOI: 10.1002/adma.202107355
Youngseok Kim ₁ , Gunwoo Kim ₁ , Bowen Ding ₂ , Dahyun Jeong ₃ , Inho Lee ₄ , Sungjun Park ₄ , Bumjoon J Kim ₃ , Iain McCulloch _{5,

6} , Martin Heeney ₂ , Myung-Han Yoon ₁

Affiliation

Owing to their outstanding electrical/electrochemical performance, operational stability, mechanical flexibility, and decent biocompatibility, organic mixed ionic–electronic conductors have shown great potential as implantable electrodes for neural recording/stimulation and as active channels for signal switching/amplifying transistors. Nonetheless, no studies exist on a general design rule for high-performance electrochemical diodes, which are essential for highly functional circuit architectures. In this work, generalizable electrochemical diodes with a very high current density over 30 kA cm⁻² are designed by introducing an asymmetric active layer based on organic mixed ionic–electronic conductors. The underlying mechanism on polarity-sensitive balanced ionic doping/dedoping is elucidated by numerical device analysis and in operando spectroelectrochemical potential mapping, while the general material requirements for electrochemical diode operation are deduced using various types of conjugated polymers. In parallel, analog signal rectification and digital logic processing circuits are successfully demonstrated to show the broad impact of circuits incorporating organic electrochemical diodes. It is expected that organic electrochemical diodes will play vital roles in realizing multifunctional soft bioelectronic circuitry in combination with organic electrochemical transistors.

中文翻译：

非对称有源层设计实现的高电流密度有机电化学二极管

由于其出色的电/电化学性能、操作稳定性、机械灵活性和良好的生物相容性，有机混合离子-电子导体显示出巨大的潜力，可作为用于神经记录/刺激的可植入电极和作为信号切换/放大晶体管的有源通道。尽管如此，还没有关于高性能电化学二极管的一般设计规则的研究，这对于高功能电路架构是必不可少的。^{在这项工作中，具有超过 30 kA cm -2}的非常高电流密度的通用电化学二极管通过引入基于有机混合离子 - 电子导体的不对称活性层来设计。通过数值器件分析和操作光谱电化学势映射阐明了极性敏感平衡离子掺杂/去掺杂的潜在机制，而使用各种类型的共轭聚合物推断了电化学二极管操作的一般材料要求。同时，成功演示了模拟信号整流和数字逻辑处理电路，以展示包含有机电化学二极管的电路的广泛影响。预计有机电化学二极管将在与有机电化学晶体管结合实现多功能软生物电子电路方面发挥重要作用。

更新日期：2021-12-01

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