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Controlling the on/off current ratio of ferroelectric field-effect transistors #MMPMID26160465
Katsouras I; Zhao D; Spijkman MJ; Li M; Blom PWM; Leeuw DMd; Asadi K
Sci Rep 2015[]; 5 (ä): ä PMID26160465show ga
The on/off current ratio in organic ferroelectric field-effect transistors (FeFETs) is largely determined by the position of the threshold voltage, the value of which can show large device-to-device variations. Here we show that by employing a dual-gate layout for the FeFET, we can gain full control over the on/off ratio. In the resulting dual-gate FeFET the ferroelectric gate provides the memory functionality and the second, non-ferroelectric, control gate is advantageously used to set the threshold voltage. The on/off ratio can thus be maximized at the readout bias. The operation is explained by the quantitative analysis of charge transport in a dual-gate FeFET.