TiO2 nanotube structures for the enhancement of photon utilization in sensitized solar cells

Lin, Jia Bin; Liu, Xiaolin; Zhu, Shu; Chen, Xianfeng

doi:10.1515/ntrev-2014-0028

Cited by 7 publications

(5 citation statements)

References 266 publications

(274 reference statements)

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“…Also, the larger nanotubes have a similar phenomenon, however, the reflectivity decreases to 18% in the violet band. Furthermore, a considerable reduction in reflectance is observed because the absorption edge for TiO 2 -nt had a band gap energy of 3.0 eV and these results agree with other reports [36,37]. For nanocavities, the reflectance spectrum changes considerably because of interference fringes (see figure 6(a)).…”

Section: Resultssupporting

confidence: 89%

Self-organized and self-assembled TiO₂ nanosheets and nanobowls on TiO₂ nanocavities by electrochemical anodization and their properties

et al. 2020

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In this research work, we prepared for the first time TiO 2 nanosheets and nanobowls assembled on an arrangement of TiO 2 nanocavities, and studied their morphological, optical, and structural properties. The assembled nanostructures were synthesized by a fast two-step electrochemical anodization using fluorides and ethylene glycol. By Field Emission Scanning Electron Microscopy, we showed that these nanostructures have a morphology well organized and ordered with a homogeneous distribution. Also, other characteristics such as photoluminescence, reflectance spectra, band gap energy, and Raman spectra were studied and compared with the optical and structural properties of TiO 2 nanotubes. We found that the time of anodization is a key parameter to control the final shape of the individual elements in the nanostructure. Our results show that when nanobowls or nanosheets are self-assembled on nanocavities the morphological, optical, and structural properties change significantly in comparison to TiO 2 nanotubes. Furthermore, the emission was improved considerably and the band gap energy was modified to higher energy values. Likewise, the interference fringes are generated in the reflectance spectra by the length of the nanocavities and by the thickness of the nanobowls and the nanosheets. Finally, a reduction on the displaced the E g(1) Raman mode was observed with decreasing of the length of the nanocavities.

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Section: Resultssupporting

confidence: 89%

Self-organized and self-assembled TiO₂ nanosheets and nanobowls on TiO₂ nanocavities by electrochemical anodization and their properties

et al. 2020

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“…Among the variety of approaches to the preparation of photonic crystals (e.g., self-organization of colloidal particles [8,9] and holographic lithography [10]), the most promising method for synthesis of titanium oxide photonic crystals is the anodizing of titanium under periodic anodizing conditions [11,12,13,14,15,16,17,18]. Such an approach allows one to prepare a one-dimensional PC by varying the anodizing voltage or current density leading to the change of porosity, p , and as a result, modulation of an effective refractive index [19], n eff , throughout the film thickness.…”

Section: Introductionmentioning

confidence: 99%

Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation

et al. 2019

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Photonic crystals based on titanium oxide are promising for optoelectronic applications, for example as components of solar cells and photodetectors. These materials attract great research attention because of the high refractive index of TiO2. One of the promising routes to prepare photonic crystals based on titanium oxide is titanium anodizing at periodically changing voltage or current. However, precise control of the photonic band gap position in anodic titania films is a challenge. To solve this problem, systematic data on the effective refractive index of the porous anodic titanium oxide are required. In this research, we determine quantitatively the dependence of the effective refractive index of porous anodic titanium oxide on the anodizing regime and develop a model which allows one to predict and, therefore, control photonic band gap position in the visible spectrum range with an accuracy better than 98.5%. The prospects of anodic titania photonic crystals implementation as refractive index sensors are demonstrated.

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“…The rod morphology helps to improve the electron injection and collection efficiency of TiO 2 semiconductor [ 1 , 2 , 3 , 4 , 5 ]. However, the wide band gap nature of TiO 2 engenders poor response to visible light [ 6 , 7 ]. In order to improve the photoactivity of TiO 2 , the strategy of semiconductor coupling is often used to enhance the solar energy conversion and utilization of TiO 2 [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Crystal Design and Photoactivity of TiO2 Nanorod Template Decorated with Nanostructured Bi2S3 Visible Light Sensitizer

Liang

You

Chen

2022

IJMS

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In this study, TiO2-Bi2S3 composites with various morphologies were synthesized through hydrothermal vulcanization with sputtering deposited Bi2O3 sacrificial layer method on the TiO2 nanorod templates. The morphologies of decorated Bi2S3 nanostructures on the TiO2 nanorod templates are controlled by the duration of hydrothermal vulcanization treatment. The Bi2S3 crystals in lumpy filament, nanowire, and nanorod feature were decorated on the TiO2 nanorod template after 1, 3, and 5 h hydrothermal vulcanization, respectively. Comparatively, TiO2-Bi2S3 composites with Bi2S3 nanowires exhibit the best photocurrent density, the lowest interfacial resistance value and the highest photodegradation efficiency towards Rhodamine B solution. The possible Z-scheme photoinduced charge separation mechanism and suitable morphology of Bi2S3 nanowires might account for the high photoactivity of TiO2 nanorod-Bi2S3 nanowire composites.

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TiO2 nanotube structures for the enhancement of photon utilization in sensitized solar cells

Cited by 7 publications

References 266 publications

Self-organized and self-assembled TiO₂ nanosheets and nanobowls on TiO₂ nanocavities by electrochemical anodization and their properties

Self-organized and self-assembled TiO₂ nanosheets and nanobowls on TiO₂ nanocavities by electrochemical anodization and their properties

Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation

Crystal Design and Photoactivity of TiO2 Nanorod Template Decorated with Nanostructured Bi2S3 Visible Light Sensitizer

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TiO2 nanotube structures for the enhancement of photon utilization in sensitized solar cells

Cited by 7 publications

References 266 publications

Self-organized and self-assembled TiO2 nanosheets and nanobowls on TiO2 nanocavities by electrochemical anodization and their properties

Self-organized and self-assembled TiO2 nanosheets and nanobowls on TiO2 nanocavities by electrochemical anodization and their properties

Titania Photonic Crystals with Precise Photonic Band Gap Position via Anodizing with Voltage versus Optical Path Length Modulation

Crystal Design and Photoactivity of TiO2 Nanorod Template Decorated with Nanostructured Bi2S3 Visible Light Sensitizer

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Self-organized and self-assembled TiO₂ nanosheets and nanobowls on TiO₂ nanocavities by electrochemical anodization and their properties

Self-organized and self-assembled TiO₂ nanosheets and nanobowls on TiO₂ nanocavities by electrochemical anodization and their properties