Laminated structure of organic thin-film transistors preparation and gas sensing characteristics

Using the vacuum deposition method and the organic semiconductor copper phthalocyanine make of the structure of Au (Emitte)/CuPc/Al (Base)/CuPc/Au (Collector) the five-layer laminate structure organic transistor sensor. Specially appointed gases such as O₂, NO₂ will occur oxidation-reduction reduction when they were absorbed by the emitting region´s organic thin film of organic transistor sensors, which equals to the doping effect of donor or acceptor, caused the change of carrier in organic film. To increase or decrease the carrier emitted by the source, the tunneling CuPc/Al/ CuPc double Schottky Barrier^[10] gate region is formed operating current and changed. According to measuring the current change of organic transistor sensor to determined a specific gas.