Organic electrochemical transistors (OECTs) are used widely as active devices for biosensing applications. OECT geometry can also be optimized by modifying the parameters like channel thickness and width to length ratio of the device to achieve optimum performance. The geometrical optimization of the OECT was conducted in this work using poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) as the channel material. The fabricated OECTs demonstrate a ON/OFF current ratio (1.1 × 10 3 ) and μC * of 219.1 ± 27.5 F cm −1 V −1 s −1 . The devices with a higher width/length (W/L) ratio and a thicker channel of 260 nm demonstrate a transconductance of 2.17 mS. Pulse measurements were conducted on 260 nm thick PEDOT:PSS demonstrate high volumetric capacitance and hole mobility of 57.11 ± 1.92 F cm −3 and ∼4 cm 2 V −1 s −1 respectively.

中文翻译：

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高跨导有机电化学晶体管的几何优化

有机电化学晶体管（OECT）广泛用作生物传感应用的有源器件。还可以通过修改参数（例如通道厚度以及设备的宽度与长度之比）以获得最佳性能来优化OECT几何形状。在这项工作中，使用聚（3,4-乙撑二氧噻吩）聚（苯乙烯磺酸盐）（PEDOT：PSS）作为通道材料进行了OECT的几何优化。制成的OECT的开/关电流比（1.1×10 3）和μC*为219.1±27.5 F cm -1 V -1 s -1。具有更高的宽/长（W / L）比和260 nm较厚通道的器件显示出2.17 mS的跨导。在260 nm厚的PEDOT：PSS上进行了脉冲测量，证明了高的体积电容和空穴迁移率分别为57.11±1.92 F cm -3和〜4 cm 2 V -1 s -1。