Suspension‐deposited carbon‐nanotube networks for flexible active‐matrix displays |
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Authors: | Axel Schindler Stefan Spiessberger Steffen Hergert Norbert Fruehauf James P. Novak Zvi Yaniv |
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Affiliation: | 1. University of Stuttgart, Allmandring 3b, Stuttgart, Baden‐Wuerttemberg 70569, Germany;2. Applied Nanotech, Inc., Austin, TX, USA |
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Abstract: | Abstract— The unique properties of carbon nanotubes (CNTs) promise innovative solutions for a variety of display applications. The CNTs can be deposited from suspension. These simple and low‐cost techniques will replace time‐consuming and costly vacuum processes and can be applied to large‐area glass and flexible substrates. Single‐walled carbon nanotubes (SWNTs) have been used as conducting and transparent layers, replacing the brittle ITO, and as the semiconducting layer in thin‐film transistors (TFTs). There is no need for alignment because a CNT network is used instead of single CNTs. Both processes can be applied to glass and to flexible plastic substrates. The transparent and conductive nanotube layers can be produced with a sheet resistance of 400 Ω/□ at 80% transmittance. Such layers have been used to produce directly addressed liquid‐crystal displays and organic light‐emitting diodes (OLED). The CNT‐TFTs reach on/off ratios of more than 105 and effective charge‐carrier mobilities of 1 cm2/V‐sec and above. |
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Keywords: | Carbon nanotubes vacuum‐free deposition liquid‐crystal displays organic light‐emitting diodes thin‐film transistors nanotube devices flexible electronics |
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