N‐Heterocyclic‐Carbene‐Treated Gold Surfaces in Pentacene Organic Field‐Effect Transistors: Improved Stability and Contact at the Interface |
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| Authors: | Dr Aifeng Lv Matthias Freitag Dr Kathryn M Chepiga Dr Andreas H Schäfer Prof Frank Glorius Prof Lifeng Chi |
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| Institution: | 1. Physikalisches Institut and Center for Nanotechnology (CeNTech), Universit?t Münster, Münster, Germany;2. Functional Nano & Soft Materials Laboratory (FUNSOM), Soochow University, Suzhou, China;3. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China;4. Organisch-Chemisches Institut, Universit?t Münster, Münster, Germany;5. nanoAnalytics GmbH, Münster, Germany |
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| Abstract: | N‐Heterocyclic carbenes (NHCs), which react with the surface of Au electrodes, have been successfully applied in pentacene transistors. With the application of NHCs, the charge‐carrier mobility of pentacene transistors increased by five times, while the contact resistance at the pentacene–Au interface was reduced by 85 %. Even after annealing the NHC–Au electrodes at 200 °C for 2 h before pentacene deposition, the charge‐carrier mobility of the pentacene transistors did not decrease. The distinguished performance makes NHCs as excellent alternatives to thiols as metal modifiers for the application in organic field‐effect transistors (OFETs). |
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| Keywords: | contact resistance gold electrodes N-heterocyclic carbenes OFETs surface modification |
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