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首页> 外文期刊>Science Advances >Ferroelectric polarization induces electronic nonlinearity in ion-doped conducting polymers
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Ferroelectric polarization induces electronic nonlinearity in ion-doped conducting polymers

机译：铁电极化在离子掺杂的导电聚合物中引起电子非线性

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摘要

Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is an organic mixed ion-electron conducting polymer. The PEDOT phase transports holes and is redox-active, whereas the PSS phase transports ions. When PEDOT is redox-switched between its semiconducting and conducting state, the electronic and optical properties of its bulk are controlled. Therefore, it is appealing to use this transition in electrochemical devices and to integrate those into large-scale circuits, such as display or memory matrices. Addressability and memory functionality of individual devices, within these matrices, are typically achieved by nonlinear current-voltage characteristics and bistability—functions that can potentially be offered by the semiconductor-conductor transition of redox polymers. However, low conductivity of the semiconducting state and poor bistability, due to self-discharge, make fast operation and memory retention impossible. We report that a ferroelectric polymer layer, coated along the counter electrode, can control the redox state of PEDOT. The polarization switching characteristics of the ferroelectric polymer, which take place as the coercive field is overcome, introduce desired nonlinearity and bistability in devices that maintain PEDOT in its highly conducting and fast-operating regime. Memory functionality and addressability are demonstrated in ferro-electrochromic display pixels and ferro-electrochemical transistors.
机译：聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）是有机混合离子电子导电聚合物。 PEDOT相传输空穴并且具有氧化还原活性，而PSS相传输离子。当PEDOT在其半导体状态和导电状态之间进行氧化还原切换时，将控制其主体的电子和光学特性。因此，吸引人的是在电化学装置中使用这种过渡并将其集成到大规模电路中，例如显示或存储矩阵。在这些矩阵中，单个设备的可寻址性和存储功能通常是通过非线性电流-电压特性和双稳态来实现的，这些功能可能由氧化还原聚合物的半导体-导体跃迁提供。然而，由于自放电，半导体状态的低电导率和较差的双稳性使快速操作和存储器保持不可能。我们报告说，沿着对电极涂层的铁电聚合物层可以控制PEDOT的氧化还原状态。克服了矫顽场而发生的铁电聚合物的极化切换特性，在使PEDOT保持其高传导和快速运行状态的设备中引入了所需的非线性和双稳态。存储器功能和可寻址性已在铁电致变色显示像素和铁电化学晶体管中得到证明。

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