title: Solution-Processed Copper/Reduced-Graphene-Oxide Core/Shell Nanowire Transparent Conductors.
abstract: Copper nanowire (Cu NW) based transparent conductors are promising candidates to replace ITO (indium-tin-oxide) owing to the high electrical conductivity and low-cost of copper. However, the relatively low performance and poor stability of Cu NWs under ambient conditions limit the practical application of these devices. Here, we report a solution-based approach to wrap graphene oxide (GO) nanosheets on the surface of ultrathin copper nanowires. By mild thermal annealing, GO can be reduced and high quality Cu r-GO core-shell NWs can be obtained. High performance transparent conducting films were fabricated with these ultrathin core-shell nanowires and excellent optical and electric performance was achieved. The core-shell NW structure enables the production of highly stable conducting films (over 200 days stored in air), which have comparable performance to ITO and silver NW thin films (sheet resistance ∼28 Ω/sq, haze ∼2% at transmittance of ∼90%).
authors.affiliation: Department of Chemistry, University of California , Berkeley, California 94720, United States.|California Research Alliance by BASF, University of California , Berkeley, California 94720, United States.|Materials Science Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Letian
authors.initials: L
authors.lastname: Dou
authors.affiliation: Department of Chemistry, University of California , Berkeley, California 94720, United States.|California Research Alliance by BASF, University of California , Berkeley, California 94720, United States.|Materials Science Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Fan
authors.initials: F
authors.lastname: Cui
authors.affiliation: Department of Chemistry, University of California , Berkeley, California 94720, United States.|Materials Science Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yu
authors.affiliation: BASF Corporation , Union, New Jersey 07083, United States.
authors.forename: Garo
authors.initials: G
authors.lastname: Khanarian
authors.affiliation: Department of Chemistry, University of California , Berkeley, California 94720, United States.
authors.forename: Samuel W
authors.initials: SW
authors.lastname: Eaton
authors.affiliation: Department of Chemistry, University of California , Berkeley, California 94720, United States.
authors.forename: Qin
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Department of Chemical Engineering, University of California , Berkeley, California 94720, United States.
authors.forename: Joaquin
authors.initials: J
authors.lastname: Resasco
authors.affiliation: California Research Alliance by BASF, University of California , Berkeley, California 94720, United States.
authors.forename: Christian
authors.initials: C
authors.lastname: Schildknecht
authors.affiliation: California Research Alliance by BASF, University of California , Berkeley, California 94720, United States.
authors.forename: Kerstin
authors.initials: K
authors.lastname: Schierle-Arndt
authors.affiliation: Department of Chemistry, University of California , Berkeley, California 94720, United States.|California Research Alliance by BASF, University of California , Berkeley, California 94720, United States.|Materials Science Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.|Kavli Energy NanoSciences Institute at the University of California, Berkeley and the Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.|Department of Materials Science and Engineering, University of California at Berkeley , Berkeley, California 94720, United States.
authors.forename: Peidong
authors.initials: P
authors.lastname: Yang
keywords: Cu nanowires; graphene oxide wrapping; high stability; low haze; solution-process; transparent conductors