City Research Online

Abstract

Organic field-effect transistors suffer from ultra-high operating voltages in addition to their relative low mobility. A general approach to low-operating-voltage organic field-effect transistors (OFETs) using donor/acceptor buffer layers is demonstrated. P-type OFETs with acceptor molecule buffer layers show reduced operating voltages (from 60–100 V to 10–20 V), with mobility up to 0.19 cm2 V−1 s−1 and an on/off ratio of 3 × 106. The subthreshold slopes of the devices are greatly reduced from 5–12 V/decade to 1.68–3 V/decade. This favorable combination of properties means that such OFETs can be operated successfully at voltages below 20 V (|VDS| ≤ 20 V, |VGS| ≤ 20 V). This method also works for n-type semiconductors. The reduced operating voltage and low pinch-off voltage contribute to the improved ordering of the polycrystalline films, reduced grain boundary resistance, and steeper subthreshold slopes

Publication Type:	Article
Additional Information:	This is the pre-peer reviewed version of the following article: Wu, W., Liu, Y., Wang, Y., Xi, H., Gao, X., Di, C., Yu, G., Xu, W. and Zhu, D. (2008), High-Performance, Low-Operating-Voltage Organic Field-Effect Transistors with Low Pinch-Off Voltages. Advanced Functional Materials, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/adfm.200701125/abstract. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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