Pyroelectric infrared sensor using carbon nanotube FETs with ferroelectric gate

利用铁电薄膜的热释电效应，研制了以铁电薄膜为栅绝缘体的碳纳米管场效应晶体管，并将其应用于红外传感器。在FET表现出明显的半导体性质的情况下，由于碳纳米管的光导效应，器件对来自热释电效应的光做出了相反的响应。此外，我们还发现用离子液体覆盖碳纳米管沟道可以大大提高响应依赖于铁电薄膜极化方向的器件的成品率。

We have developed carbon nanotube (CNT) field effect transistors (FETs) with ferroelectric thin films as gate insulators and applied to infrared sensors using pyroelectric effect of the ferroelectric thin films. In the case of FETs showing apparent semiconductive nature, the devices responded to the light inversely expecting from the pyroelectric effect due to the photoconductive effect of the CNTs. Additionally, we have found that the yield of the device with the response depending on the polarization direction of the ferroelectric film was much improved by covering the CNT channel with ionic liquid.