Rapid Electrochemical Cleaning Silver Nanowire Thin Films for High-Performance Transparent Conductors

Journal of the American Chemical Society
Yongjie GeXiangfeng Duan

Abstract

Silver nanowire (Ag-NW) thin films are of considerable interest for next-generation transparent conductors (TCs). However, their carrier transport properties are largely plagued by the residual polyvinylpyrrolidone (PVP) ligands on surface that were introduced during the synthesis of the Ag-NWs. Here we report a rapid electrochemical cleaning strategy to thoroughly remove the surface PVP ligands and greatly improve the carrier transport properties of the Ag-NW thin films while not affecting their transmittance. In particular, we show a negative electrochemical potential near the hydrogen adsorption/evolution regime can effectively displace all PVP ligands from the Ag-NW surface in 5-15 s, producing ultraclean interfaces between Ag-NW/Ag-NW junctions or Ag-NW film/active layer junction in a stacked optoelectronic device. We show that the removal of the PVP ligands can substantially reduce the sheet resistance of the Ag-NW thin film from 49 to 13 ohm/sq (with 90.91% transmittance at 550 nm) and reduce the interfacial resistance at the Ag-NW film/active layer interface by 94.3%. Such improved Ag-NW thin films can greatly enhance the sensitivity of the wearable strain sensor and the current collection efficiency of the vertically s...Continue Reading

References

Jan 15, 2008·Nano Letters·Jung-Yong LeePeter Peumans
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Apr 10, 2013·ACS Nano·Waynie M Schuette, William E Buhro
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Aug 23, 2016·Journal of Colloid and Interface Science·Ahiud Morag, Raz Jelinek
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Jul 1, 2017·Journal of the American Chemical Society·Jin-Long WangShu-Hong Yu
Sep 16, 2017·Science Advances·Nan LiuZhenan Bao

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Citations

May 15, 2020·Chemical Communications : Chem Comm·Sian-Hong TsengMing-Yen Lu
Jun 19, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Myung-Hoon ChoiLane A Baker
Jul 29, 2021·Nanotechnology·Shuaipeng GeYan Fang
Nov 19, 2021·Advanced Science·Hyunjoong KimTaeghwan Hyeon

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