• 文献标题:   Time to failure modeling of silver nanowire transparent conducting electrodes and effects of a reduced graphene oxide over layer
  • 文献类型:   Article
  • 作  者:   KWAN YCG, LE QL, HUAN CHA
  • 作者关键词:   silver nanowire, graphene oxide, transparent conducting electrode, spray coating, green proces, time to failure modeling
  • 出版物名称:   SOLAR ENERGY MATERIALS SOLAR CELLS
  • ISSN:   0927-0248 EI 1879-3398
  • 通讯作者地址:   Nanyang Technol Univ
  • 被引频次:   14
  • DOI:   10.1016/j.solmat.2015.08.005
  • 出版年:   2016

▎ 摘  要

Transparent conducting electrodes (TCE) with increased robustness and stability were produced from a composite of silver nanowires (AgNW) and reduced graphene oxide (GO) using ultrasonic spray coating. Ultrasonic spray coating is suited for large area depositions and thin films of AgNW and reduced GO TCEs with consistent optoelectronic prqperties were produced using this method and the reduction of GO was kept environmentally friendly by using ascorbic acid (AA) as the reducing agent. TCEs produced in this manner were highly conductive and had an average sheet resistance of 5.3 Omega/square and an average transmittance of 64.9% - the best TCE produced in this manner had a figure of merit of 190. Here, AgNWs were protected from humidity induced degradation and the effect of capillary instability at elevated temperatures on the nanowires was retarded by the introduction of a GO-AA over layer. A tau value of 1.5 x 10(-9). was found to signify the onset of capillary instability induced failure in the AgNW TCE and from experimentally supported calculations, it was predicted that the lifetimes of nanowire TCEs under thermal degradation could be extended significantly by keeping the gaseous environment oxygen free. (C) 2015 Elsevier B.V. All rights reserved.