Laser forward transfer of silver electrodes for organic thin-film transistors
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- Kim, H., Auyeung, R.C.Y., Lee, S.H. et al. Appl. Phys. A (2009) 96: 441. doi:10.1007/s00339-009-5225-z
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Organic thin-film transistors (OTFTs) with top- and bottom-contact configurations were fabricated using silver nano-inks printed by laser forward transfer for the gate and source/drain electrodes with pentacene and poly-4-vinylphenol as the organic semiconductor and dielectric layers, respectively. The volume of the laser-printed Ag pixels was typically in the subpicoliter (0.2–0.4 pl) range. The top-contact OTFTs resulted in lower contact resistance compared to those obtained from the bottom-contact OTFTs, and showed improved overall device performance. The top-contact OTFTs exhibited field-effect mobilities of ∼0.16 cm2 V−1 s−1 and on/off current ratios of ∼105.