Novel Flexible Transparent Conductive Films with Enhanced Chemical and Electromechanical Sustainability: TiO 2 Nanosheet-Ag Nanowire Hybrid

Hiesang Sohn, Seyun Kim, Weonho Shin, Jong Min Lee, Hyangsook Lee, Dong Jin Yun, Kyoung Seok Moon, In Taek Han, Chan Kwak, Seong Ju Hwang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Flexible transparent conductive films (TCFs) of TiO 2 nanosheet (TiO 2 NS) and silver nanowire (Ag NW) network hybrid were prepared through a simple and scalable solution-based process. The as-formed TiO 2 NS-Ag NW hybrid TCF shows a high optical transmittance (TT: 97% (90.2% including plastic substrate)) and low sheet resistance (R s : 40 Ω/sq). In addition, the TiO 2 NS-Ag NW hybrid TCF exhibits a long-time chemical/aging and electromechanical stability. As for the chemical/aging stability, the hybrid TCF of Ag NW and TiO 2 NS reveals a retained initial conductivity (ΔR s /R s < 1%) under ambient oxidant gas over a month, superior to that of bare Ag NW (δR s /R s > 4000%) or RuO 2 NS-Ag NW hybrid (δR s /R s > 200%). As corroborated by the density functional theory simulation, the superb chemical stability of TiO 2 NS-Ag NW hybrid is attributable to the unique role of TiO 2 NS as a barrier, which prevents Ag NW's chemical corrosion via the attenuated adsorption of sulfidation molecules (H 2 S) on TiO 2 NS. With respect to the electromechanical stability, in contrast to Ag NWs (δR/R 0 152.9%), our hybrid TCF shows a limited increment of fractional resistivity (ΔR/R 0 - 14.4%) after 200 000 cycles of the 1R bending test (strain: 6.7%) owing to mechanically welded Ag NW networks by TiO 2 NS. Overall, our unique hybrid of TiO 2 NS and Ag NW exhibits excellent electrical/optical properties and reliable chemical/electromechanical stabilities.

Original languageEnglish
Pages (from-to)2688-2700
Number of pages13
JournalACS Applied Materials and Interfaces
Volume10
Issue number3
DOIs
Publication statusPublished - 2018 Jan 24

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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