title: Solution-processed titanium carbide MXene films examined as highly transparent conductors.
abstract: MXenes, a new family of two-dimensional structures, have recently gained significant attention due to their unique physical properties suitable for a wide range of potential applications. Here we introduce Ti3C2Txdelaminated monolayers as ultrathin transparent conductors with properties exceeding comparable reduced graphene oxide films. Solution processed Ti3C2Txfilms exhibit sheet resistances as low as 437 Ω sq-1with 77% transmittance at 550 nm. Field effect transistor measurements confirm that these films have a metallic nature, which makes them suitable as electrodes. We show using Kelvin Probe Atomic Force Microscopy that the work function of delaminated Ti3C2Txflakes (with OH terminal groups) is 5.28 ± 0.03 eV. These results demonstrate that solution-processed Ti3C2Txconducting films could open up a new direction for the next generation of transparent conductive electrodes.
authors.affiliation: Department of Chemical & Environmental Engineering, Yale University, New Haven, Connecticut 06511, USA. andre.taylor@yale.edu.
authors.forename: Marina
authors.initials: M
authors.lastname: Mariano
authors.affiliation: Department of Material Science and Engineering and A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Olha
authors.initials: O
authors.lastname: Mashtalir
authors.affiliation: Department of Chemical & Environmental Engineering, Yale University, New Haven, Connecticut 06511, USA. andre.taylor@yale.edu.
authors.forename: Francisco Q
authors.initials: FQ
authors.lastname: Antonio
authors.affiliation: Department of Chemical & Environmental Engineering, Yale University, New Haven, Connecticut 06511, USA. andre.taylor@yale.edu and Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul, 04310, Republic of Korea.
authors.forename: Won-Hee
authors.identifier: http://orcid.org/0000-0002-0203-2992
authors.initials: WH
authors.lastname: Ryu
authors.affiliation: Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.
authors.forename: Bingchen
authors.initials: B
authors.lastname: Deng
authors.affiliation: Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, USA.
authors.forename: Fengnian
authors.initials: F
authors.lastname: Xia
authors.affiliation: Department of Material Science and Engineering and A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: Yury
authors.initials: Y
authors.lastname: Gogotsi
authors.affiliation: Department of Chemical & Environmental Engineering, Yale University, New Haven, Connecticut 06511, USA. andre.taylor@yale.edu.
authors.forename: André D
authors.initials: AD
authors.lastname: Taylor