Towards highly stable polymer electronics
(Conference Presentation)

Mark Nikolka; Iyad Nasrallah; Katharina Broch; Aditya Sadhanala; Michael Hurhangee; Iain McCulloch; Henning Sirringhaus

doi:10.1117/12.2236467

2 November 2016 Towards highly stable polymer electronics (Conference Presentation)

Mark Nikolka, Iyad Nasrallah, Katharina Broch, Aditya Sadhanala, Michael Hurhangee, Iain McCulloch, Henning Sirringhaus

Proceedings Volume 9943, Organic Field-Effect Transistors XV; 99430J (2016) https://doi.org/10.1117/12.2236467
Event: SPIE Organic Photonics + Electronics, 2016, San Diego, California, United States

Abstract

Due to their ease of processing, organic semiconductors are promising candidates for applications in high performance flexible displays and fast organic electronic circuitry. Recently, a lot of advances have been made on organic semiconductors exhibiting surprisingly high performance and carrier mobilities exceeding those of amorphous silicon. However, there remain significant concerns about their operational and environmental stability, particularly in the context of applications that require a very high level of threshold voltage stability, such as active-matrix addressing of organic light-emitting diode (OLED) displays. Here, we report a novel technique for dramatically improving the operational stress stability, performance and uniformity of high mobility polymer field-effect transistors by the addition of specific small molecule additives to the polymer semiconductor film. We demonstrate for the first time polymer FETs that exhibit stable threshold voltages with threshold voltage shifts of less than 1V when subjected to a constant current operational stress for 1 day under conditions that are representative for applications in OLED active matrix displays. The approach constitutes in our view a technological breakthrough; it also makes the device characteristics independent of the atmosphere in which it is operated, causes a significant reduction in contact resistance and significantly improves device uniformity. We will discuss in detail the microscopic mechanism by which the molecular additives lead to this significant improvement in device performance and stability.

Conference Presentation

Citation Download Citation

Mark Nikolka, Iyad Nasrallah, Katharina Broch, Aditya Sadhanala, Michael Hurhangee, Iain McCulloch, and Henning Sirringhaus "Towards highly stable polymer electronics (Conference Presentation)", Proc. SPIE 9943, Organic Field-Effect Transistors XV, 99430J (2 November 2016); https://doi.org/10.1117/12.2236467

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KEYWORDS

Polymers

Organic light emitting diodes

Electronics

Organic semiconductors

Polymer thin films

Transistors

Amorphous silicon

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