title: UV light emitting transparent conducting tin-doped indium oxide (ITO) nanowires.
abstract: Multifunctional single crystalline tin-doped indium oxide (ITO) nanowires with tuned Sn doping levels are synthesized via a vapor transport method. The Sn concentration in the nanowires can reach 6.4 at.% at a synthesis temperature of 840 °C, significantly exceeding the Sn solubility in ITO bulks grown at comparable temperatures, which we attribute to the unique feature of the vapor-liquid-solid growth. As a promising transparent conducting oxide nanomaterial, layers of these ITO nanowires exhibit a sheet resistance as low as 6.4 Ω/[Symbol: see text] and measurements on individual nanowires give a resistivity of 2.4 × 10(-4) Ω cm with an electron density up to 2.6 × 10(20) cm(-3), while the optical transmittance in the visible regime can reach ∼ 80%. Under the ultraviolet excitation the ITO nanowire samples emit blue light, which can be ascribed to transitions related to defect levels. Furthermore, a room temperature ultraviolet light emission is observed in these ITO nanowires for the first time, and the exciton-related radiative process is identified by using temperature-dependent photoluminescence measurements.
authors: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.
authors: J
authors: J
authors: Gao
authors: R
authors: R
authors: Chen
authors: D H
authors: DH
authors: Li
authors: L
authors: L
authors: Jiang
authors: J C
authors: JC
authors: Ye
authors: X C
authors: XC
authors: Ma
authors: X D
authors: XD
authors: Chen
authors: Q H
authors: QH
authors: Xiong
authors: H D
authors: HD
authors: Sun
authors: T
authors: T
authors: Wu
mesh_terms: D004563:Electrochemistry / Q000379:methods; D008027:Light; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D036103:Nanotechnology / Q000379:methods*; D053770:Nanowires / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013696:Temperature; D014001:Tin / Q000737:chemistry; D017971:Tin Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017971:Tin Compounds; C109984:indium tin oxide; D014001:Tin; D012825:Silicon