All printed touchless human-machine interface based on only five functional materials

We demonstrate the printing of a complex smart integrated system using only five functional inks: the fluoropolymer P(VDF:TrFE) (Poly(vinylidene fluoride trifluoroethylene) sensor ink, the conductive polymer PEDOT:PSS (poly(3,4 ethylenedioxythiophene):poly(styrene sulfonic acid) ink, a conductive carbon paste, a polymeric electrolyte and SU8 for separation. The result is a touchless human-machine interface, including piezo- and pyroelectric sensor pixels (sensitive to pressure changes and impinging infrared light), transistors for impedance matching and signal conditioning, and an electrochromic display. Applications may not only emerge in human-machine interfaces, but also in transient temperature or pressure sensing used in safety technology, in artificial skins and in disposable sensor labels.

[1]  Barbara Stadlober,et al.  Synthesis of Ferroelectric Poly(Vinylidene Fluoride) Copolymer Films and their Application in Integrated Full Organic Pyroelectric Sensors , 2007 .

[2]  S. Bauer,et al.  An All‐Printed Ferroelectric Active Matrix Sensor Network Based on Only Five Functional Materials Forming a Touchless Control Interface , 2011, Advanced materials.

[3]  Wolfram Wersing,et al.  Piezoelectricity: Evolution and Future of a Technology , 2008 .

[4]  Takao Someya,et al.  Chemical and Physical Sensing by Organic Field‐Effect Transistors and Related Devices , 2010, Advanced materials.

[5]  T. Someya,et al.  Integration of organic FETs with organic photodiodes for a large area, flexible, and lightweight sheet image scanners , 2005, IEEE Transactions on Electron Devices.

[6]  Wolfgang Kowalsky,et al.  Large Area Electronics Using Printing Methods , 2005, Proceedings of the IEEE.

[7]  T. Someya,et al.  Conformable, flexible, large-area networks of pressure and thermal sensors with organic transistor active matrixes. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[8]  Pasqualina M. Sarro,et al.  A 3 × 1 integrated pyroelectric sensor based on VDF/TrFE copolymer , 1996 .

[9]  David Nilsson,et al.  Bi-stable and dynamic current modulation in electrochemical organic transistors , 2002 .

[10]  Robert Forchheimer,et al.  Electrochemical Logic Circuits , 2005, New Electronics.

[11]  Pasqualina M. Sarro,et al.  Realization of an integrated VDF/TrFE copolymer-on-silicon pyroelectric sensor , 1995 .

[12]  K. Suzuki,et al.  Piezoelectricity and pyroelectricity in vinylidene fluoride/trifluoroethylene copolymers , 1984 .

[13]  Dennis L. Polla,et al.  Micromachined infrared detectors based on pyroelectric thin films , 1995, Optics & Photonics.

[14]  Gerwin H. Gelinck,et al.  High-performance solution-processed polymer ferroelectric field-effect transistors , 2005 .

[15]  Barbara Stadlober,et al.  Low‐Voltage Organic Thin‐Film Transistors with High‐k Nanocomposite Gate Dielectrics for Flexible Electronics and Optothermal Sensors , 2007 .

[16]  S. Bauer,et al.  Flexible active-matrix cells with selectively poled bifunctional polymer-ceramic nanocomposite for pressure and temperature sensing skin , 2009 .

[17]  Barbara Stadlober,et al.  Pyroelectric scanning probe microscopy: A method for local measurement of the pyroelectric effect in ferroelectric thin films , 2010 .

[18]  N. Neumann,et al.  Application of P(VDF/TrFE) thin films in pyroelectric detectors , 1991 .