Electrical and optical properties of thin films prepared by spin coating a dispersion of nano-sized tin-doped indium oxide particles

Ederth, J.; Hultåker, A.; Heszler, Péter; Niklasson, Gunnar A.; Granqvist, Claes G.; Doorn, Arie van; Haag, C.; Jongerius, M. J.; Burgard, Detlef

doi:10.1088/0964-1726/11/5/308

Cited by 17 publications

(8 citation statements)

References 11 publications

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“…7). Similar observations have been reported for thin films prepared from dispersions of nano-sized ITO particles [31][32][33]. In these cases the long term decrease of the conductivity during storage in air for several weeks was proposed to be due to incorporation of oxygen into the lattice and re-oxidation of the films.…”

Section: Electrical Conductivitysupporting

confidence: 81%

Optimisation of chemical solution deposition of indium tin oxide thin films

2014

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An environmentally friendly aqueous sol-gel process has been optimised to deposit indium tin oxide (ITO) thin films, aiming to improve the film properties and reduce the deposition costs. It was demonstrated how parameters such as cation concentration and viscosity could be applied to modify the physical properties of the sol and thereby reduce the need for multiple coatings to yield films with sufficient conductivity. The conductivity of the thin films was enhanced by adjusting the heat treatment temperature and atmosphere. Both increasing the heat treatment temperature of the films from 530 to 800°C and annealing in reducing atmosphere significantly improved the electrical conductivity, and conductivities close to the state of the art sputtered ITO films were obtained. A pronounced decreased conductivity was observed after exposing the thin films to air and the thermal reduction and ageing of the film was studied by in situ conductivity measurements.

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Section: Electrical Conductivitysupporting

confidence: 81%

Optimisation of chemical solution deposition of indium tin oxide thin films

2014

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“…Being optically transparent and electrically conductive, ITO film does not obscure illumination of the chamber and, at the same time, can generate Joule heat when electrical power is applied to it. However, there are challenges in coating polymeric materials with ITO because standard thin-film vapor-deposition systems melt polymeric targets due to high temperatures in the vicinity of the vapor sources, and alternative sol-gel nanoparticle deposition methods (32,33) give relatively poor quality and stability of the ITO coatings (34,35). Therefore, specialized low-temperature sputter-deposition systems are typically required (36).…”

Section: Discussionmentioning

confidence: 99%

Transparent Polymeric Cell Culture Chip with Integrated Temperature Control and Uniform Media Perfusion

et al. 2006

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Modern microfabrication and microfluidic technologies offer new opportunities in the design and fabrication of miniaturized cell culture systems for online monitoring of living cells. We used laser micromachining and thermal bonding to fabricate an optically transparent, low-cost polymeric chip for long-term online cell culture observation under controlled conditions. The chip incorporated a microfluidic flow equalization system, assuring uniform perfusion of the cell culture media throughout the cell culture chamber. The integrated indium-tin-oxide heater and miniature temperature probe linked to an electronic feedback system created steady and spatially uniform thermal conditions with minimal interference to the optical transparency of the chip. The fluidic and thermal performance of the chip was verified by finite element modeling and by operation tests under fluctuating ambient temperature conditions. HeLa cells were cultured for up to 2 weeks within the cell culture chip and monitored using a time-lapse video recording microscopy setup. Cell attachment and spreading was observed during the first 10-20 h (lag phase). After approximately 20 h, cell growth gained exponential character with an estimated doubling time of about 32 h, which is identical to the observed doubling time of cells grown in standard cell culture flasks in a CO2 incubator.

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“…This problem is typically addressed by a so-called sintering process, during which conductive neck formation between the particles, accompanied by the removal of stabilizers, occurs. Such thermal sintering has been shown to result in transparency values comparable to that of sputtered films; the resistivity values, however, remained one to two orders of magnitude higher 21–23 . Moreover, such an approach requires high-temperatures (400–600 °C), consequently making it ineffective for heat-sensitive substrates.…”

Section: Introductionmentioning

confidence: 99%

Laser sintering of gravure printed indium tin oxide films on polyethylene terephthalate for flexible electronics

Serkov

Snelling

Heusing

et al. 2019

Sci Rep

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Tin doped indium oxide (ITO) thin films provide excellent transparency and conductivity for electrodes in displays and photovoltaic systems. Current advances in producing printable ITO inks are reducing the volume of wasted indium during thin film patterning. However, their applicability to flexible electronics is hindered by the need for high temperature processing that results in damage to conventional polymer substrates. Here, we detail the conditions under which laser heating can be used as a replacement for oven and furnace treatments. Measurements of the optical properties of both the printed ITO film and the polymer substrate (polyethylene terephthalate, PET) identify that in the 1.5–2.0 μm wavelength band there is absorption in the ITO film but good transparency in PET. Hence, laser light that is not absorbed in the film does not go on to add a deleterious energy loading to the substrate. Localization of the energy deposition in the film is further enhanced by using ultrashort laser pulses (~1 ps) thus limiting heat flow during the interaction. Under these conditions, laser processing of the printed ITO films results in an improvement of the conductivity without damage to the PET.

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Electrical and optical properties of thin films prepared by spin coating a dispersion of nano-sized tin-doped indium oxide particles

Abstract: Thin films were made by spinning a dispersion of tin-doped indium oxide particles, having an average diameter of 14 nm, onto glass substrates. As-deposited thin films displayed a resistivity ρ of 0.3 Ω m and some optical ab… Show more

Cited by 17 publications

References 11 publications

Optimisation of chemical solution deposition of indium tin oxide thin films

Optimisation of chemical solution deposition of indium tin oxide thin films

Transparent Polymeric Cell Culture Chip with Integrated Temperature Control and Uniform Media Perfusion

Laser sintering of gravure printed indium tin oxide films on polyethylene terephthalate for flexible electronics

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