The Study Of Copper Phthalocyanine (CuPC) Organic Thin Film Transistors (OTFTs) Device

Over the past few decades time, organic thin film transistors (OTFTs) have attracted widespread concerns due to the high application potential and value in organic electronic devices such as displays, sensors, radio discrimination tag, and so on. For improving their performance, a lot of new organic semiconductors have been manufactured. The rapid development of these materials promotes the improvement of OTFTs performance. Oppositely, there are just little studies on improving structure.Therefore, our study focuses on device structure in the former four chapters, and focuses on the driving function of OTFTs in fifth chapter. The specific contents are as follows:(1) We prepare two kinds of OTFTs devices which are based on the structure of top-contact and bottom-contact, respectively. In these devices, CuPC has been used as organic semiconductor and Au has been used as drain-source electrodes. The performance of these devices is compared and analyzed. The field-effect mobility and threshold voltage of the devices based on the top-contact is 0.017cm~2/v.s and -5.4V which outgo than the bottom-contact devices. So the performance of top-contact devices is better than the bottom-contact devices.(2) The OTFTs devices with the structure of top-gate and bottom-gate have been prepared, respectively. The field-effect mobility and threshold voltage of the devices based on the top-gate is 0.019cm~2/v.s and -5.3V which outgo than the bottom-gate devices. Finally, we find the structure of top-gate and top-contact is more appropriate in single-gate device.(3) To improve the performance of OTFTs devices further, we design the structure of dual-gate. The bigger output current is gained in small deriving-voltage and the mobility is higher than single-gate device. So the dual-gate OTFTs have better performance.(4) We particularly introduce the practical application of OTFTs in flat panel display such as liquid crystal display (LCD) and organic light emitting diode (OLED). The CuPC-OTFT prepared by us is successful in driving OLED device.