Device operation mechanism of field-effect transistors with high mobility donor-acceptor polymer semiconductors

Takayuki Okachi; Tomoya Kashiki; Kenichiro Ohya

doi:10.1117/12.2187572

31 August 2015 Device operation mechanism of field-effect transistors with high mobility donor-acceptor polymer semiconductors

Takayuki Okachi, Tomoya Kashiki, Kenichiro Ohya

Author Affiliations +

Proceedings Volume 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII; 95680I (2015) https://doi.org/10.1117/12.2187572
Event: SPIE Organic Photonics + Electronics, 2015, San Diego, California, United States

Abstract

The mechanism of high field-effect mobility observed recently in transistors with donor-acceptor alternating polymers was experimentally and numerically examined. It was revealed that the trapped electrons injected from the drain electrode into the lowest unoccupied molecular orbital states of semiconductor polymers cause a deviation from the ideal transistor curve and result in an overestimation of hole mobilities. The field-effect mobility of 19 cm²/Vs was deduced by the standard formula for extracting mobility in the saturation regime after electron trapping, while the true mobility of 0.84 cm²/Vs was extracted before electron trapping.

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Takayuki Okachi, Tomoya Kashiki, and Kenichiro Ohya "Device operation mechanism of field-effect transistors with high mobility donor-acceptor polymer semiconductors", Proc. SPIE 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII, 95680I (31 August 2015); https://doi.org/10.1117/12.2187572

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