有机电化学晶体管材料、器件及功能  

Materials,devices and applications of organic electrochemical transistors

作　　者：李正珂 岳晚 Zhengke Li;Wan Yue(School of Materials Science and Engineering,Sun Yat-Sen University,Guangzhou 510006,China)

机构地区：[1]中山大学材料科学与工程学院,广州510006

出　　处：《科学通报》2024年第20期2856-2868,共13页Chinese Science Bulletin

基　　金：国家自然科学基金(22275212,413030038,52203251);国家重点研发计划(2022YFA1206600);广州基础与应用基础研究基金(202201011153);广东基础与应用基础研究基金(2022A1515110729);广州市柔性电子材料与可穿戴设备重点实验室项目(202102100010)资助。

摘　　要：有机电化学晶体管具有实现高灵敏度的传感及突破“冯·诺依曼瓶颈”实现低功耗的神经形态计算的潜力.目前有限的活性层材料及低的器件性能严重制约着其进一步集成与应用,器件性能的进一步提升亟需关键活性层材料的原始创新.本文综述了本课题组近五年在有机电化学晶体管材料和器件方面的研究进展.我们从材料源头创新出发,致力于材料制备方法、材料结构、聚集态结构、离子电子耦合传输对材料光电性质的影响以及相关的基本规律和物理过程,打破传统设计思路,发展非金属聚合/偶联方法,使用有效的多功能分子设计与结构调控策略制备新概念共轭高分子/寡聚物/小分子混合离子电子导体的有机电化学晶体管活性层材料;开发有机电化学晶体管的关键技术,实现若干集高性能、高稳定性、柔性于一体的有机电化学晶体管,构筑面向柔性、可穿戴器件的传感及低功耗的有机突触晶体管,对柔性生物电子学的发展具有积极的促进意义.The organic electrochemical transistors have attracted much attention due to their high sensitivity and potential to overcome the low-efficiency challenge posed by the von Neumann bottleneck of modern computation systems.Up to now,much effort has been focused on the development of high-performance devices that can be applied in flexible bioelectronics and biosensors.The performance of organic electrochemical transistors is mainly determined by the active layer,which needs to be carefully designed and optimized to achieve the best device performance.To address this issue,we have developed a series of novel conjugated polymers,oligomers,and small molecules to serve as active layers in organic electrochemical transistors,organic thermoelectric devices,and organic artificial synapses.Through backbone engineering,side chain engineering,and solvent engineering,the chemical structure,processing technology,and device structure have been fully optimized to achieve devices with high performance and good stability.For PDI-based n-type small molecules,a high-performance organic electrochemical transistor was achieved by isomerization of diPDI to obtain a highly twisted d-gdiPDI,which has a strong positive effect on the charge storage properties and thus on the performance of organic electrochemical transistors.It is worth mentioning that d-gdiPDI exhibits a high volumetric capacitance of 657 F cm^(−3),which is the highest value reported to date for small-molecule OECT materials.For fused n-type small molecules based on naphthalene bis-isatin and rhodanine acceptor units,a highμC^(*)of 31.6 F cm^(−1)V^(−1)s^(−1)was achieved by extending the molecular scaffold into the oligomer domain.By optimizing the energy level and side chain engineering of isoindigo-based polymers,organic electrochemical transistors with normalized values of 4.09 F cm^(−1)V^(−1)s^(−1),a normalized transconductance of 0.94 S cm^(−1),excellent operational stability,and a long shelf-life under ambient conditions were obtained.We also develop

关 键 词：有机混合离子电子导体 有机半导体 有机电化学晶体管 有机突触晶体管 传感 

分 类 号：TN321.4[电子电信—物理电子学] TB30[一般工业技术—材料科学与工程]