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18 September 2018 New designs for high-performance polymer thin-film transistors (Conference Presentation)
Ananth Dodabalapur, Kelly Liang, Oleksiy Kratko
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Proceedings Volume 10739, Organic Field-Effect Transistors XVII; 107390V (2018) https://doi.org/10.1117/12.2322180
Event: SPIE Organic Photonics + Electronics, 2018, San Diego, California, United States
Abstract
One of the important challenges in the field of thin-film transistors is to improve designs that result in performance speeds to the GHz level. With polymer semiconductors, non-quasistatic circuits such as rectifiers in which the maximum frequency depends on the carrier transit time, have been demonstrated to work to a few 10’s of MHz. The challenge is to realize clocked sequential circuits that operate as speeds much larger than the few 10’s of kHz that have been demonstrated so far. One of the keys to this, which has received a lot of attention, is improved carrier mobility in new materials. It is also necessary to reduce the channel length considerably without serious degradation in performance. We present designs based on nanostriped polymer and other semiconductors that are very suitable for scaling down the channel length. We show that in such devices, we can achieve enhanced carrier densities and mobilities compared to regular planar devices at all channel lengths. Importantly, we can also potentially reduce the contact resistance on account of the high conductivities that result from this geometry. This will be helpful in reducing channel length. A nanostriped geometry also improves gate control and reduces short channel effects. With our optimized TFT model we demonstrate all these effects. We also compare our model predictions with experimental data from organic and polymer transistors.
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Ananth Dodabalapur, Kelly Liang, and Oleksiy Kratko "New designs for high-performance polymer thin-film transistors (Conference Presentation)", Proc. SPIE 10739, Organic Field-Effect Transistors XVII, 107390V (18 September 2018); https://doi.org/10.1117/12.2322180
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KEYWORDS
Polymers
Transistors
Thin films
Polymer thin films
Data modeling
Semiconductors
Resistance
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