Titanium dioxide and Zinc oxide as a Dielectric Material for Application in TFT’s

Omprakash, S. S.; Kumar, S. K. Naveen; Holla, Ravishankar

doi:10.1016/j.matpr.2017.12.370

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…ZnO 30 or SnO 2 31 are common as oxide layers. Although ITO/Ag/ITO structures 32 as low-e coatings have been little reported in the literature, electrodes in photovoltaic solar cells are their main application.…”

Section: Introductionmentioning

confidence: 99%

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Bianchi¹,

Marques²,

Silva³

et al. 2021

Preprint

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A new concept of oxide-metal-oxide structures that combine photothermoelectric effect with high reflectance (~80%) at wavelengths in the infrared (> 1100 nm) and high transmittance in the visible range is reported here. This was observed in optimized ITO/Ag/ITO structure, 20 nm of Siver (Ag) and 40 nm of Indium Tin Oxide (ITO), deposited on Aluminum doped Zinc Oxide (AZO) thin film. These layers show high energy saving efficiency by keeping the temperature constant inside a glazed compartment under solar radiation, but additionally they also show a photothermoelectric effect. Under uniform heating of the sample a thermoelectric effect is observed (S = 40 μV/K), but when irradiated, a potential proportional to the intensity of the radiation is also observed. Therefore, in addition to thermal control in windows, these low emission coatings can be applied as transparent photothermoelectric devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Bianchi¹,

Marques²,

Silva³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…In TCOs, this adjustment is made by tuning the dopant concentration, as the NIR absorbance usually increases with increasing dopant level 25 . Ag is often used as metal layer in oxide-metal-oxide multilayers, however some studies have shown several advantages such as the durability in using Cu or Al instead 26 , while TiO 2 27 , ZnO 28 or SnO 2 29 are common as oxide layers. Although ITO/Ag/ITO structures 1 as low-e coatings have been little reported in the literature, electrodes in photovoltaic solar cells are their main application.…”

Section: Introductionmentioning

confidence: 99%

Near infrared photothermoelectric effect in transparent AZO/ITO/Ag/ITO thin films

Bianchi

Marques

Silva

et al. 2021

Sci Rep

View full text Add to dashboard Cite

A new concept of oxide-metal-oxide structures that combine photothermoelectric effect with high reflectance (~ 80%) at wavelengths in the infrared (> 1100 nm) and high transmittance in the visible range is reported here. This was observed in optimized ITO/Ag/ITO structure, 20 nm of Silver (Ag) and 40 nm of Indium Tin Oxide (ITO), deposited on Aluminum doped Zinc Oxide (AZO) thin film. These layers show high energy saving efficiency by keeping the temperature constant inside a glazed compartment under solar radiation, but additionally they also show a photothermoelectric effect. Under uniform heating of the sample a thermoelectric effect is observed (S = 40 mV/K), but when irradiated, a potential proportional to the intensity of the radiation is also observed. Therefore, in addition to thermal control in windows, these low emission coatings can be applied as transparent photothermoelectric devices.

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“…Al 2 O 3 , MgO, BeO). Metal oxides based semiconductors and insulators have more application oriented properties as they play the key role in electronics domain [2]. Among the available metal oxides, TiO 2 is one of the best materials in the field of medical electronics due to their properties such as nontoxic, biocompatible, chemically stable, high band gap, high dielectric constant and inexpensive [3].…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and conductivity study of hydrothermally synthesized TiO₂ nanorods

Kumar

Yesappa

2020

Mater. Res. Express

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TiO 2 nanorods are synthesized by hydrothermal method using the commercially available TiO 2 nanopowder (P25) as a precursor. This work mainly focused on the study of the various properties and comparison among the P25, 20 mg TiO 2 nanorods and 40 mg TiO 2 nanorods by different characterizations. Fourier Transform Infrared Spectroscopy (FTIR) was carried out and the results confirmed the formation and presence of TiO 2 nanorods by shifting peak positions from 1433 cm −1 to 1424cm −1 and 1420cm −1 . The x-ray diffraction (XRD) results indicate that the crystallinity of TiO 2 nanorods increased significantly and was confirmed by the variation in the diffraction peak intensity and the peak at 2θ=25.23°is conformed the anatase phase. The Field Emission Scanning Electron Microscope (FESEM) images clearly show the formation and presence of TiO 2 nanorods. Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA) reveal that increasing in thermal stability and differential scanning calorimeter (DSC) evaluates the increase in melting temperature of TiO 2 nanorods. The UV-vis absorption spectra show the absorption peak redshift towards higher wavelength and it leads to expansion of optical activities of TiO 2 nanorods. The optical band gap energy was found to be decreased to 5.3, 5.2 and 4.9 eV for P25, 20 and 40 mg respectively. The dielectric constant has increased twice and the dielectric loss by almost ten times compared to dielectric constant and dielectric loss of the P25. The current versus voltage (I-V) characteristics show the linear curve which reveals the easy flow of current is more in TiO 2 nanorods. From the obtained results, it could be concluded that TiO 2 nanorods are suitable for potential applications.

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Titanium dioxide and Zinc oxide as a Dielectric Material for Application in TFT’s

Cited by 8 publications

References 5 publications

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Near infrared photothermoelectric effect in transparent AZO/ITO/Ag/ITO thin films

Structural, optical and conductivity study of hydrothermally synthesized TiO₂ nanorods

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Titanium dioxide and Zinc oxide as a Dielectric Material for Application in TFT’s

Cited by 8 publications

References 5 publications

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Near Infrared Photothermoelectric Effect in Transparent AZO/ITO/Ag/ITO Thin Films

Near infrared photothermoelectric effect in transparent AZO/ITO/Ag/ITO thin films

Structural, optical and conductivity study of hydrothermally synthesized TiO2 nanorods

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Product

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Structural, optical and conductivity study of hydrothermally synthesized TiO₂ nanorods