The Compromise Between Conductivity and Transparency

Andrés, A. de; Jimenez-Villacorta, F.; Prieto, C.

doi:10.1002/9783527804603.ch1

Cited by 6 publications

(6 citation statements)

References 84 publications

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“…In addition to these two characteristics, TCOs combine a third property, namely a high chemical stability. More specifically, owing to its optoelectronic properties and its production scalability, tin-doped indium oxide (ITO) is a preferred TCO for industrial applications and it has been extensively employed as transparent electrodes for various solar cells technologies, light emitting diodes and flat panel displays 1 – 11 . However, researchers are working on the development of alternatives materials to ITO due to the Indium (In) supply challenges in the future.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, SnO x has been largely investigated in applications of gas sensors, solar cells, transparent electrodes, and thin film transistors 11 , 14 – 20 . Moreover, in the past decades, SnO was the key material for anode materials 21 , coatings 22 , catalysis 23 , and precursors for the production of SnO 2 24 , 25 , because of its properties of gas-sensitivity and metastability to transform into SnO 2 at O 2 -rich ambient.…”

Section: Introductionmentioning

confidence: 99%

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Study of wide bandgap SnOx thin films grown by a reactive magnetron sputtering via a two-step method

Zakaria

Aïssa

Fix

et al. 2022

Sci Rep

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In the present work, we report on the microstructural and optoelectronic properties of SnOx thin films deposited by a reactive radio frequency magnetron sputtering. After SnOx growth by sputtering under O2/Ar flow, we have used three different treatment methods, namely (1) as deposited films under O2/Ar, (2) vacuum annealed films ex-situ, and (3) air annealed films ex-situ. Effects of the O2/Ar ratios and the growth temperature were investigated for each treatment method. We have thoroughly investigated the structural, optical, electrical and morphology of the different films by several advanced techniques. The best compromise between electrical conductivity and optical transmission for the use of these SnOx films as an n-type TCO was the conditions O2/Ar = 1.5% during the growth process, at 250 °C, followed by a vacuum post thermal annealing performed at 5 × 10–4 Torr. Our results pointed out clear correlations between the growth conditions, the microstructural and optoelectronic properties, where highly electrically conductive films were found to be associated to larger grains size microstructure. Effects of O2/Ar flow and the thermal annealing process were also analysed and discussed thoroughly.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of wide bandgap SnOx thin films grown by a reactive magnetron sputtering via a two-step method

Zakaria

Aïssa

Fix

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…[ 22 , 23 ] Therefore, the electrical and optical properties of the devices need to be stable under optical stimulation of different wavelengths and powers for the neuron signal recordings to be unaffected. Second, since the transparency and conductivity of materials often require a compromise, [ 24 ] complicated structural design and extensive engineering must be followed to select appropriate transparent conductive materials and combine them with transparent semiconductor materials for device fabrication. Furthermore, the structure and processing techniques should be compatible with those of the ECoG array, and transistors produced by the same process should possess stable electrical and optical performance.…”

Section: Introductionmentioning

confidence: 99%

Multimodal Electrocorticogram Active Electrode Array Based on Zinc Oxide‐Thin Film Transistors

Zhang¹,

Zhang

Xia

et al. 2022

Advanced Science

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Active electrocorticogram (ECoG) electrodes can amplify weak electrophysiological signals and improve anti‐interference ability; however, traditional active electrodes are opaque and cannot realize photoelectric collaborative observation. In this study, an active and fully transparent ECoG array based on zinc oxide thin‐film transistors (ZnO TFTs) is developed as a local neural signal amplifier for electrophysiological monitoring. The transparency of the proposed ECoG array is up to 85%, which is superior to that of the previously reported active electrode arrays. Various electrical characterizations have demonstrated its ability to record electrophysiological signals with a higher signal‐to‐noise ratio of 19.9 dB compared to the Au grid (13.2 dB). The high transparency of the ZnO‐TFT electrode array allows the concurrent collection of high‐quality electrophysiological signals (32.2 dB) under direct optical stimulation of the optogenetic mice brain. The ECoG array can also work under 7‐Tesla magnetic resonance imaging to record local brain signals without affecting brain tissue imaging. As the most transparent active ECoG array to date, it provides a powerful multimodal tool for brain observation, including recording brain activity under synchronized optical modulation and 7‐Tesla magnetic resonance imaging.

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“…22,23 Therefore, electrical and optical properties of the devices need to be stable under light stimulation of different wavelengths and powers, so that it does not affect the neuron signal recoding. Secondly, since transparency and conductivity of materials often require a compromise, 24 complicated structural design and extensive engineering must be taken to select appropriate transparent conductive materials and combine it with transparent semiconductor materials for the device fabrication. Furthermore, the structure and processing techniques should be compatible with that for ECoG array, and the transistors produced by the same process are supposed to possess stable electrical and optical performance.…”

Section: Introductionmentioning

confidence: 99%

Multimodal electrocorticogram active electrode array based on zinc oxide-thin film transistors

Zhang¹,

Zhang

Xia

et al. 2022

Preprint

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Active electrocorticogram (ECoG) electrodes can amplify the weak electrophysiological signals and improve the anti-interference ability, but the traditional active electrodes are so opaque that cannot realize photoelectric collaborative observation. Here an active and fully-transparent ECoG array based on zinc oxide-thin film transistors (ZnO-TFTs) was developed as the local neural signal amplifier for electrophysiological monitoring. The transparency of the proposed ECoG array was up to 85% which is superior to previous reported active electrode array. Various electrical characterizations demonstrated its ability of electrophysiological signal recording, with a higher signal-to-noise ratio of 19.9 dB compared to the Au grid one (13.2 dB). The high transparency of ZnO-TFT electrode array allowed the collecting electrophysiological signals under direct light stimulation on optogenetic mice brain concurrently. The ECoG array could also work under 7-Tesla magnetic resonance imaging to record local brain signal without affecting brain tissue imaging. As the most transparent active ECoG array to date, it provides a powerful multimodal tool for brain observation, including recording brain activity under synchronized optical modulation and 7-Tesla magnetic resonance imaging.

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The Compromise Between Conductivity and Transparency

Cited by 6 publications

References 84 publications

Study of wide bandgap SnOx thin films grown by a reactive magnetron sputtering via a two-step method

Study of wide bandgap SnOx thin films grown by a reactive magnetron sputtering via a two-step method

Multimodal Electrocorticogram Active Electrode Array Based on Zinc Oxide‐Thin Film Transistors

Multimodal electrocorticogram active electrode array based on zinc oxide-thin film transistors

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