We demonstrate the performance of thin film transistor devices based on a solution processable organic semiconductor
with a field effect mobility of up to
2.5cm2V-1s-1. The performance of the material is demonstrated in a top gate, bottom
contact device architecture operational in air without the requirement for device encapsulation. From a device
performance aspect, we also highlight the influence that contact resistance has on the mobility.
The fabrication of high resolution light emitting polymer (LEP) OLED displays using ink jet printing to deposit the hole conducting and conjugated polymer electroluminescent components has required the development of both printing and ink technology. We review the issues associated with meeting the technology requirement and split these into the areas of ink delivery, getting the correct volume out of ink jet nozzles with well defined velocity and direction; surface energy considerations to maximize aperture ratio and display resolution; solution drying to form flat films and solution formulation to create polymer films that perform as well as films created by conventional spin coating. In addition we will describe the current status of the technology both in terms of polymer performance for both passive and active matrix applications, printing technology and polymer ink performance.
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