Improved Optical Sintering Efficiency at the Contacts of Silver Nanowires Encapsulated by a Graphene Layer. Issue 11 (17th December 2014)

• Record Type: Journal Article
• Authors: Yang, Seung‐Bok; Choi, HongKyw; Lee, Da Som; Choi, Choon‐Gi; Choi, Sung‐Yool; Kim, Il‐Doo
• Is Part Of: Small. Volume 11:Issue 11(2015)
• Page Start: 1293
• Page End: 1300
• Publication Date: 2014-12-17
• Subjects: Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201402474
• Languages: English
• ISSNs: 1613-6810

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Graphene/silver nanowire (AgNWs) stacked electrodes, i.e., graphene/AgNWs, are fabricated on a glass substrate by air‐spray coating of AgNWs followed by subsequent encapsulation via a wet transfer of single‐layer graphene (SLG) and multilayer graphene (MLG, reference specimen) sheets. Here, graphene is introduced to improve the optical sintering efficiency of a xenon flash lamp by controlling optical transparency and light absorbing yield in stacked graphene/AgNW electrodes, facilitating the fusion at contacts of AgNWs. Intense pulsed light (IPL) sintering induced ultrafast (&lt;20 ms) welding of AgNW junctions encapsulated by graphene, resulting in approximately a four‐fold reduction in the sheet resistance of IPL‐treated graphene/AgNWs compared to that of IPL‐treated AgNWs. The role of graphene in IPL‐treated graphene/AgNWs is further investigated as a passivation layer against thermal oxidation and sulfurization. This work demonstrates that optical sintering is an efficient way to provide fast welding of Ag wire‐to‐wire junctions in stacked electrodes of graphene/AgNWs, leading to enhanced conductivity as well as superior long‐term stability under oxygen and sulfur atmospheres.</p> </abstract>