Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Exploratory Research for Advanced Technology (ERATO), Japan Science and Technology Agency (JST) , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
ACS Appl Mater Interfaces. 2017 Aug 30;9(34):28151-28156. doi: 10.1021/acsami.7b09756. Epub 2017 Aug 21.
We demonstrate systematic work function tuning of thiol-based SAM-modified gold electrodes with high controllability and sensitivity as high as 0.05 eV using vacuum ultraviolet technique (VUV). Under different irradiation times, both work function and wettability of the metal surface is modified. Fine tuning of the electrode work function is demonstrated by observable changes in the reverse current of a polymer Schottky diode. Additionally, the change in SAM chemical functionality validates the work function changes of VUV-irradiated electrodes. Our selective work function patterning on a single Au electrode via VUV could also reduce the required fabrication steps for more complex circuits.
我们使用真空紫外技术（VUV）展示了具有高度可控性和高达 0.05 eV 的灵敏度的基于硫醇的自组装单分子膜修饰金电极的系统的功函数调节。在不同的辐照时间下，金属表面的功函数和润湿性都得到了修饰。通过聚合物肖特基二极管反向电流的可观察变化，证明了电极功函数的精细调节。此外，SAM 化学官能团的变化验证了 VUV 辐照电极功函数的变化。我们通过 VUV 在单个 Au 电极上进行的选择性功函数图案化，也可以减少更复杂电路所需的制造步骤。
