All‐Carbon Nanotube‐Based Flexible Field‐Emission Devices: From Cathode to Anode |
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Authors: | Hee Jin Jeong Hae Deuk Jeong Ho Young Kim Jun Suk Kim Seung Yol Jeong Joong Tark Han Dae Suk Bang Geon‐Woong Lee |
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Affiliation: | 1. Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute (KERI), Changwon, 641‐120, Korea;2. Department of Polymer Science and Engineering, Kumoh National Institute of Technology, Gumi, Gyungbuk 730‐701, Korea |
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Abstract: | The fabrication of a flexible field‐emission device (FED) using single‐walled carbon nanotube (SWNT) network films as the conducting electrodes (anode and cathode) and thin multi‐walled CNT/TEOS hybrid films as the emitters is reported. P‐type doping with gold ions and passivation with tetraethylorthosilicate (TEOS) made the SWNT network film highly conductive and environmentally stable, and hence a good alternative to conventional indium tin oxide electrodes. CNT/TEOS hybrid emitters showed high current density, low turn‐on field, and long‐term emission stability, compared with CNT emitters; these characteristics can be attributed to the TEOS sol, acting both as a protective layer surrounding the nanotube tip, and as an adhesive layer enhancing the nanotube adhesion to the substrate. All‐CNT‐based flexible FEDs fabricated by this approach showed high flexibility in field emission characteristics and extremely bright electron emission patterns. |
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Keywords: | flexible field emission device carbon nanotube hybrid material adhesive and protective layer low temperature |
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