Abstract
(Chemical Equation Presented) 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-C61 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.
Original language | English |
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Pages (from-to) | 18220-18221 |
Number of pages | 2 |
Journal | Journal of the American Chemical Society |
Volume | 131 |
Issue number | 51 |
DOIs | |
State | Published - 30 Dec 2009 |