Printing organic thin-film transistor technology

Si thin-film transistor (a-Si TFT and LTPS-TFT) and organic thin film transistor (OTFT) based on conjugated organic semiconductor have become attractive for use in flat panel display, smart cards, RFID tags and large area sensors. An organic thin-film transistor (OTFT) can be formed on plastic substrate due to its low process temperature, <150°C. Therefore, the manufacturing cost of OTFT is lower than Si TFT because the printing process can be employed. While OTFT is applied to flexible display and electronic components, the electrical properties of OTFT such as the saturation current, the off current, the threshold voltage, and the mobility are affected by deposition of organic semiconductor, processes and environment. Therefore, the phenomenon of OTFT under different condition has to be identified.