Improved Injection in n-Type Organic Transistors with Conjugated Polyelectrolytes
Journal of the American Chemical Society2009Vol. 131(51), pp. 18220–18221
Citations Over TimeTop 10% of 2009 papers
Jung Hwa Seo, Andrea Gutacker, Bright Walker, Shinuk Cho, Andrés Garcia, Renqiang Yang, Thuc‐Quyen Nguyen, Alan J. Heeger, Guillermo C. Bazan
Abstract
To improve injection in n-type organic thin film transistors (OTFTs), a thin conjugated polyelectrolyte (CPE) layer was interposed between electrodes and the semiconductor layer. OTFTs were fabricated with [6,6]-phenyl-C(61) butyric acid methyl ester (PCBM) and Au source and drain contacts. We demonstrate that the insertion of CPEs beneath top-contact Au source/drain electrodes can be a very effective strategy for improving the carrier injection and reducing turn-on threshold voltages of n-channel OTFTs. Ultraviolet photoemission spectroscopy (UPS) indicates that the decrease of the electron injection barrier is consistent with organized dipoles at the metal/organic interface.
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