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Low Voltage, Printed, Flexible Circuits for Display and Memory

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Printed organic electronics have received increasing interest in connection with large area, flexible macroelectronics applications. In this poster, we demonstrate the printed, flexible circuits can be used for display applications, such as driving the electrochromic display or organic light emitting diode (OLED) at a low supply voltage (< 2 V). We also report a printed DRAM matrix (8×8 array) with a long retention time (> 60 s), which can be potentially combined with the display pixel array to achieve large area applications. The circuit was fabricated by aerosol jet printing of semiconducting, metallic and insulating inks. To achieve the low voltage operation, the printed dielectric consists of a gel electrolyte based on a high capacitance ionic liquid and block copolymer composite. Because of the very high capacitance (>10 μF/cm2) of the ion gel, the operation voltage of the printed circuit with a coarse channel dimension (20 μm) can be as low as 1 V. A fast digital circuit is also demonstrated by using printed high mobility (> 20 cm2/Vs) semiconducting carbon nanotubes (CNTs). A 5-stage ring oscillator achieves frequencies > 2 kHz (stage delay time ∼ 50 μs) at supply voltages of 2.5 V. This performance represents a substantial improvement for printed circuitry.

Document Type: Research Article

Publication date: 2011-01-01

More about this publication?
  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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