Investigations on the Synthesis, Optical and Electrical Properties of TiO2 Thin Films by Chemical Bath Deposition (CBD) method

Govindasamy, G Ambarasan; Murugasen, Priya; Sagadevan, Suresh

doi:10.1590/1980-5373-mr-2015-0411

Cited by 65 publications

(28 citation statements)

References 31 publications

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“…As Figure a shows, the diffraction peak at 2θ (degrees) of 25.35 was indexed as (101) planes corresponding to that of the tetragonal wurtzite structure of TiO 2 . [ 20 ] In the case of Al‐doped TiO 2 films, the diffraction peak (101) shifted to a higher angle at 2θ (degrees) of 25.45 as compared to pristine TiO 2 film. [ 21 ] From these values, we calculated the average grain size (D) and d‐spacing (Figure 1b).…”

Section: Resultsmentioning

confidence: 99%

Universal Elaboration of Al‐Doped TiO₂ as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Kim

Rhee

Lee

et al. 2020

Adv Materials Inter

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Fabricating an electron extraction layer (EEL) with a metal doping transition metal oxide (TMO) in inorganic–organic hybrid perovskite solar cells (PeSCs) and organic solar cells (OSCs) is a simple and efficient process for enhancing photovoltaic properties. Here, the universal benefits and common factors that influence both PeSCs and OSCs as a result of changes in Al‐doped TiO2 properties are investigated. These common factors are identified in two separate mechanisms. The first involves surface smoothing of TiO2 films, which affects the formation of a high crystalline active layer and reduces recombination between the electron extraction and active layers. The second involves bandgap widening of TiO2, which reduces the activation energy and enhances the quenching efficiency of devices. These factors are demonstrated in various measurements. The results will help in understanding the fundamental benefits of Al‐doped TiO2 in solution‐processed thin‐film solar cells.

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Section: Resultsmentioning

confidence: 99%

Universal Elaboration of Al‐Doped TiO₂ as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Kim

Rhee

Lee

et al. 2020

Adv Materials Inter

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“…Nano rosette TiO2 was synthesized through deposition on top of a fluorine-doped tin oxide (FTO, 30 Ω/cm 2 ) glass substrate via a hydrothermal method similar to the previously reported procedure used by Govindasamy et al (2016) with a slight modification. In a typical synthesis, distilled water was mixed with hydrochloric acid at a fixed volume ratio of 1:1 to reach a total volume of 40 mL in a beaker glass.…”

Section: Methodsmentioning

confidence: 99%

“…For example, the 3D nano-flower hierarchical structures of TiO2 have been proven to enhance its photocatalytic properties (Zhou et al, 2013). Xiao et al (2017) and Govindasamy et al (2016) have reported that the use of a combination of compact TiO2 layers with the growth of TiO2 nanorods as an electron transporting layer has improved the performance of perovskite solar cells.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Nano Rosette TiO2 Hydrothermally Grown on Glass Substrate at Different Reaction Time and Acid Concentration

Sofyan¹,

Yuwono²,

Ridhova³

et al. 2018

IJTech

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The characteristics of nano rosette TiO2 hydrothermally grown on a glass substrate at different reaction times and acid concentrations has been examined. The hydrothermal reaction was performed at 170°C for 3, 4, 5, and 6 hours whereas the crystallization was achieved through calcination at 450°C for 90 minutes. The growth mechanism was observed by employing the hydrothermal reaction under different acid concentrations: 0%, 12.5%, 25%, and 50% v/v HCl. The morphology, formation, crystallization, and growth mechanism of the nano rosette TiO2 were characterized using a field emission scanning electron microscope (FE-SEM) and X-ray diffraction (XRD). The electron images showed that after 3 hours of hydrothermal reaction time, the nucleation process has just taken place; the formation of the nano rosette was completed after 6 hours. The results also showed that the acid environment plays a dominant role in determining the three-dimensional (3D) architecture of the nano rosette TiO2. Structural studies from XRD showed that different acid concentrations resulted in different crystalline formations. The nano rosette rutile TiO2 crystal structure was formed after 6 hours of hydrothermal reaction under 1:1 distilled water and HCl with a structure indexed to rutile P42/mnm with lattice parameters of a = 4.557(6) Å and c = 2.940(5) Å.

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“…Several methods have been used to prepare TiO 2 other metal oxide nanostructure films, including chemical vapor deposition (CVD) [1], pulsed laser deposition [2], reactive sputtering [3], chemical bath deposition (CBD) [4] [5] and sol-gel spin coating [6] [7]. The sol-gel spin coating has emerged as one of the new commercially viable nano-TiO 2 fabrication methodologies as this method produces samples with a uniform synthetic strategy needed for high-efficient UV-Vis optical response.…”

Section: Introductionmentioning

confidence: 99%

Sol-Gel Spin Coating Synthesis of TiO<sub>2</sub> Nanostructure and Its Optical Characterization

Amole¹,

Awodele²,

Adedokun³

et al. 2019

MSCE

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This work focuses on the sol-gel spin coating technique of TiO 2 nanostructure synthesis and its characterization. Though various methods have been used to fabricate TiO 2 nanostructure, much effort has not been exerted to achieve better photoresponsive and narrowly dispersed TiO 2 nanostructure using the sol-gel spin coating method. Therefore, it is imperative to realize the synthesis of TiO 2 nanostructures, and investigate their properties. In this work, TiO 2 is synthesized by sol-gel spin coating technique using titanium tetraisopropoxide, isopropanol, acetic acid and deionized water as starting materials and deposited on borosilicate glass substrates. The effects of annealing temperatures (300˚C, 400˚C and 500˚C) on the structural and optical properties of the films were investigated by different techniques: Scanning Electron Microscopy (SEM), optical microscopy and UV-visible spectrophotometry. The optical characterization showed the direct band gap at 3.7 eV, 3.6 eV and 3.4 eV for 300˚C, 400˚C and 500˚C, respectively, and the optical transmittance and reflectance spectra showed a greater performance at 500˚C. The grain sizes obtained from SEM annealed at 300˚C, 400˚C and 500˚C are found to be about 6.0 nm, 5.0 nm and 4.0 nm respectively. The grain size of TiO 2 nanostructure films decreased with increasing annealing temperatures. The results clearly indicated that the sol-gel spin coating synthesis of TiO 2 nanostructure and post-thermal treatment at 500˚C cooled naturally at room temperature result in better photoresponsive and narrowly dispersed TiO 2 nanostructure films with higher photoresponsive and good optical properties.

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Investigations on the Synthesis, Optical and Electrical Properties of TiO2 Thin Films by Chemical Bath Deposition (CBD) method

Cited by 65 publications

References 31 publications

Universal Elaboration of Al‐Doped TiO₂ as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Universal Elaboration of Al‐Doped TiO₂ as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Characteristics of Nano Rosette TiO2 Hydrothermally Grown on Glass Substrate at Different Reaction Time and Acid Concentration

Sol-Gel Spin Coating Synthesis of TiO<sub>2</sub> Nanostructure and Its Optical Characterization

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Investigations on the Synthesis, Optical and Electrical Properties of TiO2 Thin Films by Chemical Bath Deposition (CBD) method

Cited by 65 publications

References 31 publications

Universal Elaboration of Al‐Doped TiO2 as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Universal Elaboration of Al‐Doped TiO2 as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Characteristics of Nano Rosette TiO2 Hydrothermally Grown on Glass Substrate at Different Reaction Time and Acid Concentration

Sol-Gel Spin Coating Synthesis of TiO&lt;sub&gt;2&lt;/sub&gt; Nanostructure and Its Optical Characterization

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Universal Elaboration of Al‐Doped TiO₂ as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Universal Elaboration of Al‐Doped TiO₂ as an Electron Extraction Layer in Inorganic–Organic Hybrid Perovskite and Organic Solar Cells

Sol-Gel Spin Coating Synthesis of TiO<sub>2</sub> Nanostructure and Its Optical Characterization