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Transparent Conducting Films (transparent + conducting_film)

Distribution by Scientific Domains
Physics and Astronomy50%

Selected Abstracts

Flexible, Stretchable, Transparent Conducting Films Made from Superaligned Carbon Nanotubes

ADVANCED FUNCTIONAL MATERIALS, Issue 6 2010
Chen Feng
Abstract A straightforward roll-to-roll process for fabricating flexible and stretchable superaligned carbon nanotube films as transparent conducting films is demonstrated. Practical touch panels assembled by using these carbon nanotube conducting films are superior in flexibility and wearability,and comparable in linearity,to touch panels based on indium tin oxide (ITO) films. After suitable laser trimming and deposition of Ni and Au metal, the carbon nanotube film possesses excellent performance with two typical values of sheet resistances and transmittances (208,, ,,1, 90% and 24,, ,,1, 83.4%), which are comparable to ITO films and better than the present carbon nanotube conducting films in literature. The results provide a route to produce transparent conducting films more easily, effectively, and cheaply, an important step for realizing industrial-scale applications of carbon nanotubes for transparent conducting films. [source]

Developmental toxicity of indium: Embryotoxicity and teratogenicity in experimental animals

CONGENITAL ANOMALIES, Issue 4 2008
Mikio Nakajima
ABSTRACT Indium, a precious metal classified in group 13 (IIIB) in the periodic table, has been used increasingly in the semiconductor industry. Because indium is a rare metal, technology for indium recycling from transparent conducting films for liquid crystal displays is desired, and its safety evaluation is becoming increasingly necessary. The developmental toxicity of indium in experimental animals was summarized. The intravenous or oral administration of indium to pregnant animals causes growth inhibition and the death of embryos in hamsters, rats, and mice. The intravenous administration of indium to pregnant animals causes embryonic or fetal malformation, mainly involving digit and tail deformities, in hamsters and rats. The oral administration of indium also induces fetal malformation in rats and rabbits, but requires higher doses. No teratogenicity has been observed in mice. Caudal hypoplasia, probably due to excessive cell loss by increased apoptosis in the tailbud, in the early postimplantation stage was considered to account for indium-induced tail malformation as a possible pathogenetic mechanism. Findings from in vitro experiments indicated that the embryotoxicity of indium could have direct effects on the conceptuses. Toxicokinetic studies showed that the embryonic exposure concentration was more critical than the exposure time regarding the embryotoxicity of indium. It is considered from these findings that the risk of the developmental toxicity of indium in humans is low, unless an accidentally high level of exposure or unknown toxic interaction occurs because of possible human exposure routes and levels (i.e. oral, very low-level exposure). [source]

Flexible, Stretchable, Transparent Conducting Films Made from Superaligned Carbon Nanotubes

ADVANCED FUNCTIONAL MATERIALS, Issue 6 2010
Chen Feng
Abstract A straightforward roll-to-roll process for fabricating flexible and stretchable superaligned carbon nanotube films as transparent conducting films is demonstrated. Practical touch panels assembled by using these carbon nanotube conducting films are superior in flexibility and wearability,and comparable in linearity,to touch panels based on indium tin oxide (ITO) films. After suitable laser trimming and deposition of Ni and Au metal, the carbon nanotube film possesses excellent performance with two typical values of sheet resistances and transmittances (208,, ,,1, 90% and 24,, ,,1, 83.4%), which are comparable to ITO films and better than the present carbon nanotube conducting films in literature. The results provide a route to produce transparent conducting films more easily, effectively, and cheaply, an important step for realizing industrial-scale applications of carbon nanotubes for transparent conducting films. [source]

Helicon-wave-excited plasma sputtering deposition of Ga-doped ZnO transparent conducting films

PHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 11 2006
Mutsumi Sugiyama
Abstract Sputtering deposition of Ga-doped ZnO (ZnO:Ga) thin films was carried out using the helicon-wave-excited plasma sputtering (HWPS) method. The films sputtered above 150 °C had a preferential {0001} orientation. According to the surface-damage-free nature, the films having featureless surface morphology exhibited an optical transmittance greater than 80% in the visible spectral wavelengths. However, because the deposition temperature was limited to 250 °C, the electron mobility was limited to as low as 2,3 cm2/V s due to the small grain size (,25 nm). The results indicate that ZnO:Ga films deposited by HWPS can be used in the transparent conducting oxide layer, provided that higher electron mobility is achieved. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Ga-doped ZnO transparent conducting films prepared by helicon-wave-excited plasma sputtering

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 5 2009
Shingo Masaki
Abstract Gallium-doped zinc oxide (ZnO:Ga) transparent conducting films were prepared by the helicon-wave-excited plasma sputtering (HWPS) method. The films exhibited a dominant [0001]-oriented growth with a small full width at half maximum of the (0002) ZnO diffraction peak (0.28 degrees). A high optical transmittance greater than 80% was achieved in the wavelength range between 400 and 1600 nm, because the HWPS method essentially does not damage the film surface. The results indicate that CdS-free Cu(In,Ga)Se2 -based solar cells may be fabricated by sputtering ZnO:Ga directly on the Cu(In,Ga)Se2 layer using the HWPS method. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]