Electrical Properties of Nano-TiO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Thin Film Using Spin Coating Method

Daniyan, A. A.; Umoru, L.E.; Fasasi, A.Y.; Borode, J. O.; Oluwasegun, K. M.; Olusunle, S.O.O.

doi:10.4236/jmmce.2014.21003

Cited by 12 publications

(9 citation statements)

References 15 publications

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“…By using Four-point probe system interfaced to a computer with Lab-view software and coupled with Keithley 2400 series source meter, the sheet resistance of the screen printed TiO2 nanoparticle thin films was obtained to be 6.052 × 104 Ω/sq. This sheet resistance translated into resistivity value of 7.02 × 10 -3 Ω cm which was in agreement with the values reported in literature [14]. From this value of resistivity, the conductivity of the TiO2 thin film was 1.414 × 102 S/m and therefore the Hall mobility for TiO2 film was found to be 7.122 × 101 cm 2 /Vs.…”

Section: Hall Effect Studies Of Tio 2 Compact Layersupporting

confidence: 90%

Characteristics of TiO2 Compact Layer prepared for DSSC application

Musila

Munji

Simiyu

et al. 2018

PoS

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Dye-sensitized solar cells (DSSCs) offer an economically reliable and suitable alternative in moderating the challenges presented by the existing convectional photovoltaic cells. However, the efficiency of dye-sensitized solar cells has remained relatively low. For this reason, this research was aimed at studying the characteristics of TiO 2 compact layer that can be applied in DSSCs as a way of improving efficiency. To achieve this, TiO 2 compact layer was deposited on a conductive glass substrate by using Holmarc's Spray Pyrolysis system, using Ultrasonic Spray Head and spraying in the vertical geometry. X-ray Diffraction studies revealed that TiO 2 compact layer was of anatase phase and had tetragonal crystalline structure. Raman spectroscopy showed that the most intense peak appeared at 142 cm-1 due to the external vibration of the anatase structure. Hall Effect studies revealed that TiO 2 compact layer has a high density of charge carriers' value of 1.25 × 1019 cm-3 hence it can be used in DSSC applications.

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Section: Hall Effect Studies Of Tio 2 Compact Layersupporting

confidence: 90%

Characteristics of TiO2 Compact Layer prepared for DSSC application

Musila

Munji

Simiyu

et al. 2018

PoS

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“…After removing the carbon layer, the photonically processed films possessed sheet resistance comparable to the thermally annealed control TiO 2 thin films. The observed sheet resistance was comparable to similar results measured on an ITO substrate [90]. The measured films were deposited on top of ITO coated glass to maintain constant growth conditions.…”

Section: Electricalsupporting

confidence: 85%

Pulsed photoinitiated fabrication of inkjet printed titanium dioxide/reduced graphene oxide nanocomposite thin films

et al. 2018

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This work reports a new technique for scalable and low-temperature processing of nanostructured TiO thin films, allowing for practical manufacturing of TiO-based devices such as perovskite solar cells at low-temperature or on flexible substrates. Dual layers of dense and mesoporous TiO/graphitic oxide nanocomposite films are synthesized simultaneously using inkjet printing and pulsed photonic irradiation. Investigation of process parameters including precursor concentration (10-20 wt%) and exposure fluence (4.5-8.5 J cm) reveals control over crystalline quality, graphitic oxide phase, film thickness, dendrite density, and optical properties. Raman spectroscopy shows the E peak, characteristic of anatase phase titania, increases in intensity with higher photonic irradiation fluence, suggesting increased crystallinity through higher fluence processing. Film thickness and dendrite density is shown to increase with precursor concentration in the printed ink. The dense base layer thickness was controlled between 20 and 80 nm. The refractive index of the films is determined by ellipsometry to be 1.92 ± 0.08 at 650 nm. Films exhibit an energy weighted optical transparency of 91.1%, in comparison to 91.3% of a thermally processed film, when in situ carbon materials were removed. Transmission and diffuse reflectance are used to determine optical band gaps of the films ranging from 2.98 to 3.38 eV in accordance with the photonic irradiation fluence and suggests tunability of TiO phase composition. The sheet resistance of the synthesized films is measured to be 14.54 ± 1.11 Ω/□ and 28.90 ± 2.24 Ω/□ for films as-processed and after carbon removal, respectively, which is comparable to high temperature processed TiO thin films. The studied electrical and optical properties of the light processed films show comparable results to traditionally processed TiO while offering the distinct advantages of scalable manufacturing, low-temperature processing, simultaneous bilayer fabrication, and in situ formation of removable carbon nanocomposites.

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“…All the powders are in nanoparticles because of the uniqueness of nanoparticles. When materials are reduced to nanoscale, they displayed distinctive properties that are quite different from what they exhibit in their bulk state . Nanocomposite materials have various distinctive properties like better corrosion and wear resistance, resistance to high temperature oxidation, self lubricity, and so on…”

Section: Methodsmentioning

confidence: 99%

“…Materials reduced to the nanoscale can display very different properties compared to what they exhibit on a micro scale, enabling unique applications. For instance, opaque substances become transparent (copper); inert materials attain catalytic properties (platinum); stable materials turn combustible (aluminum); solids turn into liquid at room temperature (gold); insulators become semi conductors (silicon) . A wide range of these materials are now available and in use in many commercial, industrial, and military applications.…”

Section: Introductionmentioning

confidence: 99%

Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO₂/WO₃‐ZnO‐SnO₂ nanocomposite coatings

Daniyan

Umoru

Popoola

et al. 2018

Materials & Corrosion

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In this work, the optical, electrical, and corrosion properties of Zn‐TiO2 and Zn‐TiO2‐WO3‐ZnO‐SnO2 nanocomposite coatings produced via electrocodeposition were investigated. The morphological characteristics of the composite coatings were characterized by scanning electron microscope (SEM) equipped with energy dispersive spectrometer (EDS). The electrical characterization was obtained using Four‐point probe system coupled with Keithley 2400 Series Sourcemeter, interfaced by a lab view tracer software and multimeters. The optical examination was carried out with the aid of Newport Solar Simulator with maximum intensity of 1000 W/m2 but the experiment was carried out at working intensity of 750 W/m2. The air mass was 1.5 A.M (same as that of real atmosphere). The corrosion properties were evaluated by linear polarization in 1 M HCl and 3.5% NaCl. The result showed that the coatings exhibited good stability and Zn‐TiO2‐WO3‐ZnO‐SnO2 nanocomposite coatings showed improved microstructural properties, outstanding electrical conductivity, and displayed better corrosion resistance.

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Electrical Properties of Nano-TiO<sub>2</sub> Thin Film Using Spin Coating Method

Cited by 12 publications

References 15 publications

Characteristics of TiO2 Compact Layer prepared for DSSC application

Characteristics of TiO2 Compact Layer prepared for DSSC application

Pulsed photoinitiated fabrication of inkjet printed titanium dioxide/reduced graphene oxide nanocomposite thin films

Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO₂/WO₃‐ZnO‐SnO₂ nanocomposite coatings

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Electrical Properties of Nano-TiO&lt;sub&gt;2&lt;/sub&gt; Thin Film Using Spin Coating Method

Cited by 12 publications

References 15 publications

Characteristics of TiO2 Compact Layer prepared for DSSC application

Characteristics of TiO2 Compact Layer prepared for DSSC application

Pulsed photoinitiated fabrication of inkjet printed titanium dioxide/reduced graphene oxide nanocomposite thin films

Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO2/WO3‐ZnO‐SnO2 nanocomposite coatings

Contact Info

Product

Resources

About

Electrical Properties of Nano-TiO<sub>2</sub> Thin Film Using Spin Coating Method

Opto‐electrical and corrosion properties of electrocodeposited Zn‐TiO₂/WO₃‐ZnO‐SnO₂ nanocomposite coatings