A facile method for chemical doping of conducting polymers is demonstrated with an ionic liquid containing FeCl₄ ⁻ anions as the oxidizing agents. A drop of the ionic liquid on the film of a typical semicrystalline polymer immediately changed the room temperature conductivity to 500 S cm⁻¹. The highly conductive state originated from both the high doping level and the high crystallinity of the doped film, as confirmed by optical absorption and X-ray diffraction measurements, respectively. Furthermore, the doping level was continuously controlled by the gate voltage of the ionic-liquid-gated transistor structure through an electrochemical dedoping process.

中文翻译：

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用离子液体掺杂剂对导电聚合物进行简便且可控的化学掺杂

_{使用含有 FeCl 4} ^-阴离子作为氧化剂的离子液体演示了一种简便的导电聚合物化学掺杂方法。将离子液体滴在典型的半结晶聚合物的膜上立即将室温电导率改变至500S cm ^-1。高导电态源自掺杂薄膜的高掺杂水平和高结晶度，这分别通过光学吸收和 X 射线衍射测量证实。此外，通过电化学去掺杂过程，离子液体栅极晶体管结构的栅极电压连续控制掺杂水平。