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Structure and Process of Ink-Jet Printed Organic Memory

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An organic memory fabricated by ink-jet printing and thermal evaporation technique is reported. Typically, the device is formed with two buffer layers and one organic layer sandwiched between two metal electrodes. The resulting structure is glass substrate/inkjet printed silver electrode/buffer layer/organic layer/buffer layer/copper electrode positioned in sequence. For the first electrode of the device, a solution with stable dispersions of nanoparticles in a liquid vehicle was used as the printing ink. The ink contains surface modified ultra-fine particles that form stable colloids when dispersed in an appropriate solvent. This ink is jetted by a piezo ink-jet head to a pretreated glass and then thermal cured to afford a low resistive metal film. The width of each printing metal line is about 200 μm with acceptable roughness to be used as the first electrode of an organic bi-stable device (OBD). Experimental results showed that the organic memory device can be driven by voltage modulation, which causes the nonvolatile memory effect by controlling the Cu+ ion concentration within the organic layer interposed between two metal electrodes. The memory-read operation is demonstrated when the Cu+ concentration is swept to the positive electrode as the applied voltage scans from 0V to 3V. The observed on/off ratio can reach more than 105.
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Document Type: Research Article

Publication date: 2005-01-01

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  • 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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