Modulated transparent conductive zinc oxide films for efficient water splitting

Telfah, Ahmad; Al-Bataineh, Qais M.; Ahmad, Ahmad A.; Bani‑Salameh, Areen A.; Alsaad, Ahmad M.; Sabirianov, R. F.

doi:10.1007/s00339-023-07176-x

Cited by 3 publications

(2 citation statements)

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“…It explains the surface dynamics proposed of the ZnO sensing surface based on the occurrence of the adsorptiondesorption of oxygen molecules on the ZnO surface. The UV-sensing mechanism of ZnO is based on changes in physical properties by the reversible adsorption-desorption of oxygen molecules on ZnO surfaces [71]. Due to the adsorption of oxygen molecules on the surface, it reacts with free electrons from the conduction band, as shown in Equation (12).…”

Section: Uv Sensing Mechanismmentioning

confidence: 99%

Multifunctional Three-in-One Sensor on t-ZnO for Ultraviolet and VOC Sensing for Bioengineering Applications

Nagpal,

Lupan,

Bîrnaz

et al. 2024

Biosensors

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Zinc oxide (ZnO) is considered to be one of the most explored and reliable sensing materials for UV detection due to its excellent properties, like a wide band gap and high exciton energy. Our current study on a photodetector based on tetrapodal ZnO (t-ZnO) reported an extremely high UV response of ~9200 for 394 nm UV illumination at 25 °C. The t-ZnO network structure and morphology were investigated using XRD and SEM. The sensor showed a UV/visible ratio of ~12 at 25 °C for 394 nm UV illumination and 443 nm visible illumination. By increasing the temperature, monotonic decreases in response and recovery time were observed. By increasing the bias voltage, the response time was found to decrease while the recovery time was increased. The maximum responsivity shifted to higher wavelengths from 394 nm to 400 nm by increasing the operating temperature from 25 °C to 100 °C. The t-ZnO networks exhibited gas-sensing performances at temperatures above 250 °C, and a maximum response of ~1.35 was recorded at 350 °C with a good repeatability and fast recovery in 16 s for 100 ppm of n-butanol vapor. This study demonstrated that t-ZnO networks are good biosensors that can be used for diverse biomedical applications like the sensing of VOCs (volatile organic compounds) and ultraviolet detection under a wide range of temperatures, and may find new possibilities in biosensing applications.

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Section: Uv Sensing Mechanismmentioning

confidence: 99%

Multifunctional Three-in-One Sensor on t-ZnO for Ultraviolet and VOC Sensing for Bioengineering Applications

Nagpal,

Lupan,

Bîrnaz

et al. 2024

Biosensors

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“…Zinc Oxide (ZnO) film, a group II-VI wide bandgap semiconductor material, is non-toxic and affordable, possessing exceptional photoelectric, piezoelectric and dielectric characteristics [9]. Yet, ZnO possesses relatively low conductivity and charge concentration [10].…”

Section: Introductionmentioning

confidence: 99%

Atomic layer deposition of Al-doped ZnO nanomembrane with in situ monitoring

Wang,

Gu,

Zhao

et al. 2024

Nanotechnology

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Due to shortcomings such as poor homogeneity of Al doping, precisely controlling the thickness, inability to conformally deposit on high aspect ratio devices and high pinhole rate, the applications of Al-doped ZnO (AZO) nanomembrane in integrated optoelectronic devices are remarkably influenced. Here, we report in situ monitoring during the atomic layer deposition (ALD) of AZO nanomembrane by using an integrated spectroscopic ellipsometer. AZO nanomembranes with different compositions were deposited with real-time and precise atomic level monitoring of the deposition process. We specifically investigate the half reaction and thickness evolution during the ALD processes and the influence of the chamber temperature is also disclosed. Structural characterizations demonstrate that the obtained AZO nanomembranes without any post-treatment are uniform, dense and pinhole-free. The transmittances of the nanomembranes in visible range are > 94%, and the optimal conductivity can reach up to 1210 S/cm. The output of current research may pave the way for AZO nanomembrane becoming promising in integrated optoelectronic devices.

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