Nano Research

, Volume 4, Issue 12, pp 1215–1222 | Cite as

Fabrication of silver nanowire transparent electrodes at room temperature

  • Takehiro Tokuno
  • Masaya Nogi
  • Makoto Karakawa
  • Jinting Jiu
  • Thi Thi Nge
  • Yoshio Aso
  • Katsuaki Suganuma
Research Article

Abstract

Silver nanowires (AgNWs) surrounded by insulating poly(vinylpyrrolidone) have been synthesized by a polyol process and employed as transparent electrodes. The AgNW transparent electrodes can be fabricated by heat-treatment at about 200 °C which forms connecting junctions between AgNWs. Such a heating process is, however, one of the drawbacks of the fabrication of AgNW electrodes on heat-sensitive substrates. Here it has been demonstrated that the electrical conductivity of AgNW electrodes can be improved by mechanical pressing at 25 MPa for 5 s at room temperature. This simple process results in a low sheet resistance of 8.6 Ω/square and a transparency of 80.0%, equivalent to the properties of the AgNW electrodes heated at 200 °C. This technique makes it possible to fabricate AgNW transparent electrodes on heat-sensitive substrates. The AgNW electrodes on poly(ethylene terephthalate) films exhibited high stability of their electrical conductivities against the repeated bending test. In addition, the surface roughness of the pressed AgNW electrodes is one-third of that of the heat-treated electrode because the AgNW junctions are mechanically compressed. As a result, an organic solar cell fabricated on the pressed AgNW electrodes exhibited a power conversion as much as those fabricated on indium tin oxide electrodes. These findings enable continuous roll-to-roll processing at room temperature, resulting in relatively simple, inexpensive, and scalable processing that is suitable for forthcoming technologies such as organic solar cells, flexible displays, and touch screens. Open image in new window

Keywords

Silver nanowire transparent electrode room temperature flexibility organic solar cell 

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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Takehiro Tokuno
    • 1
  • Masaya Nogi
    • 1
  • Makoto Karakawa
    • 1
  • Jinting Jiu
    • 1
  • Thi Thi Nge
    • 1
  • Yoshio Aso
    • 1
  • Katsuaki Suganuma
    • 1
  1. 1.The Institute of Scientific and Industrial Research (ISIR)Osaka UniversityIbaraki, OsakaJapan

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