Influence of polyvinylpyrrolidone (PVP) capping layer on silver nanowire networks: Theoretical and experimental studies

Jinyoung Hwang, Youngseon Shim, Seon Mi Yoon, Sang Hyun Lee, Sung Hoon Park

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

This study conducts an experimental and theoretical investigation of the influence of a polyvinylpyrrolidone (PVP) capping layer on silver nanowire (AgNWs) networks. Through a washing method, a PVP layer on AgNWs was removed and the contact resistance (RC) between AgNWs was reduced, thereby obtaining a reduced sheet resistance (RS) of AgNW film. During the washing process, the thickness of the PVP layer decreased to 1 nm with an increasing number of washes, as demonstrated by a molecular dynamics simulation. In addition, the size of the change in RS resulting from the reduction in RC by the removal of PVP decreased as the areal coverage of NWs increased. In order to explain the results, Monte Carlo simulations were performed and the results show that the reduction in RC by the removal of PVP apparently reduces the value of RS more as the areal coverage of NWs decreases and the initial value of RC of the network increases. Saturation of the reduction in RS also occurs when the inherent resistance of AgNW (RNW) becomes dominant. Along with the electrical properties, improved transmittance and a reduction in haze were observed with the removal of PVP, and the results prove that RS can be reduced by reducing RC without impairing the optical properties of transparent conducting electrodes.

Original languageEnglish
Pages (from-to)30972-30977
Number of pages6
JournalRSC Advances
Volume6
Issue number37
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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