2, Department of Physics, Applied Physics and Astronomy, Binghamton University, The State University of New York, Binghamton, New York, United States
3, Department of Chemistry, Binghamton University, The State University of New York, Binghamton, New York, United States
Solution-based electronic material deposition holds promise to enable the low-cost fabrication of wearable electronics, soft robotics, and energy harvesting technologies. Conventional deposition and patterning methods for electrically-active materials, however, are only compatible with flat substrates, while future technologies will integrate circuitry into three dimensional platforms, such as prosthetics, car windshields, or contact lenses. In this presentation, we will introduce methodologies for depositing and patterning functional materials on three-dimensional substrates. The processes are simple, scalable, and use minimal quantities of starting material, opening new possibilities for device integration.
Decanethiolate-capped gold nanoparticles were deposited and laser-sintered to pattern micron-resolution electrodes on cylindrical substrates with diameters as small as a human hair. We will show how this platform enables new approaches to local pressure and chemical sensing, while balancing the need for simple processing and high performance. In addition, stripes of high-performance organic semiconductor crystallites (6,13-Bis(triisopropylsilylethynyl)pentacene,TIPS-pentacene) were deposited at targeted locations on folded flexible substrates and complex three-dimensional objects. Preferential crystallite alignment led to anisotropic charge transport, with a hole mobility of up to 0.83 cm2V-1s-1along the crystallite axis. These experiments lay the groundwork for the low-cost integration of electronic function into arbitrary non-planar substrates for sensing, energy harvesting, and display applications.