Synthesis, surface properties, crystal structure and dye sensitized solar cell performance of TiO2 nanotube arrays anodized under different voltages

Çırak, Burcu Bozkurt; Karadeniz, Sibel Morkoç; Kılınç, Tuba; Çağlar, Bülent; Ekinci, Ali Ercan; Yelgin, Hüseyin; Kürekçi, Mehmet; Çırak, Çağrı

doi:10.1016/j.vacuum.2017.07.037

Cited by 40 publications

(9 citation statements)

References 48 publications

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“…According to the Beer-Lambert law, higher absorbance in the UV-vis spectrum means higher dye concentration. 36,37) 3.3.2. Bilayer Ag@TiO 2 photoanode.…”

Section: Different Ag@tio 2 Photoanode Layersmentioning

confidence: 99%

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

Rehman¹,

Khan²,

Khan³

et al. 2021

Jpn. J. Appl. Phys.

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Dye-sensitized solar cells (DSSCs) have recently gained much attention, due to the low-cost materials and their cheaper manufacturing techniques. However, these cells show a weak response to incident solar photons, resulting in poor power-conversion efficiency. In this paper, we described an improvement to the optical absorption efficiency of DSSCs in the wavelength range between 350 nm and 750 nm using the surface plasmon-resonance effect of plasmonic nanoparticles. Three different structures are studied, including unilayer, bilayer, and trilayer photoanodes based on various core–shell plasmonic spherical nanoparticles made of Ag@TiO2. In all structures, the nanoparticle size is optimized to obtain broadband optical absorption. The absorption efficiency of the dye-sensitized solar cell is significantly improved, from 65.2% to 72.3%, by tuning the photoanode structure from unilayer to trilayer. The results show that a unilayer photoanode with smaller-sized nanoparticles leads to higher absorption, compared to larger sizes. The UV–vis results indicate that mixing large- and small-sized nanoparticles in bi- and trilayer photoanodes is a good approach for improving the light-harvesting efficiency of DSSCs, compared to uniformly distributed nanoparticles. A maximum short-circuit current density of 17.32 mA cm−2 is recorded for a photoanode based on a trilayer structure of Ag@TiO2 nanoparticles.

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“…According to the Beer-Lambert law, higher absorbance in the UV-vis spectrum means higher dye concentration. 36,37) 3.3.2. Bilayer Ag@TiO 2 photoanode.…”

Section: Different Ag@tio 2 Photoanode Layersmentioning

confidence: 99%

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

Rehman¹,

Khan²,

Khan³

et al. 2021

Jpn. J. Appl. Phys.

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“…The oxidation voltage will affect the diameter of the tube. [ 41 ] With the increase of anodic oxidation voltage, the diameter of the tube is larger and the tube wall is thinner. Comparatively, the anodic oxidation time mainly affects the length of TiO 2 nanometers.…”

Section: Methodsmentioning

confidence: 99%

TiO₂‐Au NPs Heterojunction Arrays for Sensitive and Specific Detection of Copper Ions

Jia

Tang

et al. 2021

Adv Materials Inter

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Developing simple and effective methods to detect heavy metals is a research focus in the field of environmental science and materials science. However, the interference in complex matrix is one of the main obstacles when applying those methods to in‐field detection. In this work, by anchoring Au nanoparticles (NPs) on TiO2 nanotube arrays (NTAs), a Schottky junction is successfully introduced into a Ti/TiO2/Au/chitosan heterostructure, which shows outstanding performance for sensing copper ions. The high specific surface area of TiO2 NTAs offer numerous binding sites of Au NPs and Cu2+, which increase the density of the nanoscale Schottky junctions and extend the effective detection range of the sensor. The excellent conductivity of Au NPs can reduce the impedance and improve the overall quality of the Schottky junction. Most importantly, two factors are designed to increase the specificity of the sensor: the energy barriers oriented from the Schottky junction and the Cu2+ absorbing layer composed by chitosan. The excellent sensing properties are further confirmed in real‐life samples, demonstrating its potential applications in complex scenarios.

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“…After some time, arrays of titanium dioxide nanotubes with uniform distribution, ordered arrangement and perpendicular to the substrate would be formed. The diameter of the nanotube can be controlled by the oxidation voltage ( Bozkurt Çırak et al, 2017 ); the length of the nanotube is controlled by the combination of the oxidation time ( Bhadra et al, 2020 ), the oxidation temperature ( Mohan et al, 2020 ), and the pH value of the electrolyte ( Cipriano et al, 2014 ); the smoothness of the nanotube, and the cleanliness of the surface are respectively dependent on the type of electrolyte and the water content ( Sivaprakash and Narayanan, 2020 ).…”

Section: Preparation Of Nanostructure On Titanium and Its Alloysmentioning

confidence: 99%

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

Liu

Attarilar

et al. 2020

Front. Bioeng. Biotechnol.

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Synthesis, surface properties, crystal structure and dye sensitized solar cell performance of TiO2 nanotube arrays anodized under different voltages

Cited by 40 publications

References 48 publications

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

TiO₂‐Au NPs Heterojunction Arrays for Sensitive and Specific Detection of Copper Ions

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

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Synthesis, surface properties, crystal structure and dye sensitized solar cell performance of TiO2 nanotube arrays anodized under different voltages

Cited by 40 publications

References 48 publications

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

The effect of plasmonic multilayered photoanode structures on the absorption of dye-sensitized solar cells

TiO2‐Au NPs Heterojunction Arrays for Sensitive and Specific Detection of Copper Ions

Nano-Modified Titanium Implant Materials: A Way Toward Improved Antibacterial Properties

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Product

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TiO₂‐Au NPs Heterojunction Arrays for Sensitive and Specific Detection of Copper Ions