Damp Heat Durability of Al-Doped ZnO Transparent Electrodes with Different Crystal Growth Orientations

Machda, Fahmi; Ogawa, Takahira; Okumura, Hideyuki; Ishihara, Keiichi N.

doi:10.1149/2.0261912jss

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…As the R O2 was increased, the photocatalytic activity decreased with the R O2 values up to 30% and increased with the R O2 values over 40%. We investigated the oxygen vacancy concentration, and it decreased with the R O2 values up to 30-40%, which is a general behavior under the oxygen-rich conditions [15,20]. On the other hand, interestingly, the vacancy concentration was increased with the R O2 values of more than 40%.…”

Section: Introductionmentioning

confidence: 88%

Enhanced Photocatalytic Activity of TiO2 Thin Film Deposited by Reactive RF Sputtering under Oxygen-Rich Conditions

et al. 2022

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TiO2 thin films are promising as photocatalysts to decompose organic compounds. In this study, TiO2 thin films were deposited by reactive radio-frequency (RF) magnetron sputtering under various flow rates of oxygen and argon gas. The results show that the photocatalytic activity decreases as the oxygen-gas ratio is increased to 30% or less, while the activity increases under oxygen-rich conditions. It was observed that the crystal structure changed from anatase to a composite of anatase and rutile, where the oxygen-gas ratio during RF sputtering is more than 40%. Interestingly, the oxygen vacancy concentration increased under oxygen-rich conditions, where the oxygen-gas ratio is more than 40%. The sample prepared under the most enriched oxygen condition, 70%, among our experiments exhibited the highest concentration of oxygen vacancy and the highest photocatalytic activity. Both the oxygen vacancies and the composite of anatase and rutile structure in the TiO2 films deposited under oxygen-rich conditions are considered responsible for the enhanced photocatalysis.

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Section: Introductionmentioning

confidence: 88%

Enhanced Photocatalytic Activity of TiO2 Thin Film Deposited by Reactive RF Sputtering under Oxygen-Rich Conditions

et al. 2022

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“…Mirletz et al [21] showed that employing a protective capping layer of APTES (3-ami-nopropyltriethoxysilane) resulted in greatly reduced resistivity increase percentage for AZO electrodes from 250% to 60% upon DH exposure. Machda et al [22] examined the effect of the crystal orientations on AZO damp heat stability, AZO samples with different crystal growth orientations (110) and (002) were fabricated via sputtering at various argon gas flow mixed with a fixed oxygen gas flow. A change of crystal growth orientation from (110) to (002) was reported at higher argon gas flow during deposition.…”

Section: Introductionmentioning

confidence: 99%

Environmental Stability Evaluation of Aluminium Doped Zinc Oxide (AZO) Transparent Electrodes Deposited at Low Temperature for Solar cells

Elhamali

Akhil

Abusabee

et al. 2022

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The degradation of transparent electrodes’ electrical conductivity under environmental conditions is considered as a major failure mode for solar cells’ long-term efficiency. In this paper, AZO thin films were subjected to the International Electrotechnical Commission (IEC) 61646 test to examine their environmental stability and suitability as front electrodes for solar cells. To explore the interplay between AZO deposition parameters and environmental stability, AZO films were deposited by radio frequency magnetron sputtering at different parameters and without external heating. The conductivity stability evolution upon the testwas investigated via studying the AZO electrical, structural, and morphological characteristics at different deposition conditions. A direct dependence was identified between the samples’ conductivity degradation rates and the samples’ structural and morphological characteristics including grain size, grain boundary density, surface roughness, and compactness. The samples’ resistivity increases linearly over the test period due to both electron density and mobility degradations. Improved stability was observed for thicker AZO samples (360 nm) originating from enhanced grain size, surface profile, and compactness. These samplesmaintained solar cells' applicable sheet resistance of 21.24 Ω/sq (ρ=7.64×10-4 Ω.cm) following the test. The conducted aging studies demonstrated that manipulating the AZO films growth process via optimizing the deposition parameters is an effective pathway for low-temperature deposited electrodes with enhanced environmental stability

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Damp-heat durability comparison of Al-doped ZnO transparent electrodes deposited at low temperatures on glass and PI-tape/PC substrates

Machda

Ogawa

Okumura

et al. 2020

Ceramics International

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Damp Heat Durability of Al-Doped ZnO Transparent Electrodes with Different Crystal Growth Orientations

Cited by 3 publications

References 28 publications

Enhanced Photocatalytic Activity of TiO2 Thin Film Deposited by Reactive RF Sputtering under Oxygen-Rich Conditions

Enhanced Photocatalytic Activity of TiO2 Thin Film Deposited by Reactive RF Sputtering under Oxygen-Rich Conditions

Environmental Stability Evaluation of Aluminium Doped Zinc Oxide (AZO) Transparent Electrodes Deposited at Low Temperature for Solar cells

Damp-heat durability comparison of Al-doped ZnO transparent electrodes deposited at low temperatures on glass and PI-tape/PC substrates

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