TiO2 films with rich bulk oxygen vacancies prepared by electrospinning for dye-sensitized solar cells

Li, Xiaodong; Gao, Caitian; Wang, Jiangtao; Lu, Bingan; Chen, Wanjun; Song, Jie; Zhang, Shanshan; Zhang, Zhenxing; Pan, Xiaojun; Xie, Erqing

doi:10.1016/j.jpowsour.2012.04.042

Cited by 53 publications

(25 citation statements)

References 36 publications

(36 reference statements)

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“…The lower OVs in S3 is possibly due to better diffusion of air through high aspect ratio NTs walls during annealing of the sample. OVs induced defect peak gradually shifted towards lower energy states (from 2.74-2.68 eV) with decrease of water content in the electrolytes which proves that defect proceeds from surface towards bulk [15], [16]. The NTs surface to volume ratio was in the order of S3 > S2 > S1 as reflected from the luminescence intensity profile observations which is also in well agreement with FESEM results [17].…”

Section: A Structural Characterizationssupporting

confidence: 83%

Repeatability and Stability of Room-Temperature Acetone Sensor Based on <inline-formula> <tex-math notation="TeX">$\hbox{TiO}_{2}$</tex-math></inline-formula> Nanotubes: Influence of Stoichiometry Variation

Bhowmik

Hazra

Dutta

et al. 2014

IEEE Trans. Device Mater. Relib.

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The oxygen vacancy (OV) variation of the electrochemically grown TiO 2 nanotube (NT) was achieved through stoichiometry variation by varying the volume of water in the electrolyte (NH 4 F with ethylene glycol) during anodization. By varying the water content (0%, 2%, and 10% by volume) in the mixed electrolyte, the morphology and stoichiometry of NTs were found to be varied dramatically. After detailed structural and morphological characterization by X-ray diffraction and field--emission scanning electron microscope and photoluminescence spectroscopy, the room-temperature acetone sensing was investigated by employing three distinct nanoforms derived through anodization. The reliability (i.e., repeatability and stability) of the sensors, as well as their response magnitude, was found to be greatly influenced by the variation in stoichiometry. The NTs derived with 2 volume percent H 2 O was found to offer the most promising response magnitude with excellent repeatability, whereas the best stability was ensured in the case of the NTs derived with 10 volume percent H 2 O. It was observed that an optimization of stoichiometry (OVs) and the surface-to-volume ratio is important in determining the response magnitude and repeatability. On the contrary, the stability is mainly governed by the stoichiometry only.Index Terms-Electrochemical anodization, TiO 2 nanotubes (NTs), stoichiometry variation, Oxygen vacancies (OVs), room temperature acetone sensing, repeatability and stability.

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Section: A Structural Characterizationssupporting

confidence: 83%

Repeatability and Stability of Room-Temperature Acetone Sensor Based on <inline-formula> <tex-math notation="TeX">$\hbox{TiO}_{2}$</tex-math></inline-formula> Nanotubes: Influence of Stoichiometry Variation

Bhowmik

Hazra

Dutta

et al. 2014

IEEE Trans. Device Mater. Relib.

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show abstract

“…In the work we first use the novel PECC that has the same structure as the conventional DSSCs but without dye adsorption to demonstrate the trap-to-trap electron transport in DSSCs. We concluded that these responses in the visible region should be attributed to the trap-to-trap electron transport due to the existence of trap states in TiO 2 [18,27].…”

Section: Resultsmentioning

confidence: 90%

“…There are week humps centered at 700 nm for both I sc and V oc signals. The details of the responses in the visible region are shown in our previous work [18]. In the work we first use the novel PECC that has the same structure as the conventional DSSCs but without dye adsorption to demonstrate the trap-to-trap electron transport in DSSCs.…”

Section: Resultsmentioning

confidence: 99%

“…In our previous work, we first design a photoelectrochemical cell (PECC) that has the same structure as the conventional DSSCs but without dye adsorption to demonstrate the trap-to-trap electron transport in DSSCs [18]. The PECC exhibits a considerable photovoltaic effect under UV light irradiance, inspired by which we developed an alternative approach based on PECC to detecting UV light without use of a power source.…”

Section: Introductionmentioning

confidence: 99%

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Nanocrystalline TiO2 film based photoelectrochemical cell as self-powered UV-photodetector

et al. 2012

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“…The PL spectrum of nanomaterials was related to the electron structure and recombination of charge carriers [16][17][18]. We measured PL spectra of the TiO 2 nanorods, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Characterization and acetone gas sensing properties of electrospun TiO2 nanorods

Bian

Sun

et al. 2015

Superlattices and Microstructures

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TiO2 films with rich bulk oxygen vacancies prepared by electrospinning for dye-sensitized solar cells

Cited by 53 publications

References 36 publications

Repeatability and Stability of Room-Temperature Acetone Sensor Based on <inline-formula> <tex-math notation="TeX">$\hbox{TiO}_{2}$</tex-math></inline-formula> Nanotubes: Influence of Stoichiometry Variation

Repeatability and Stability of Room-Temperature Acetone Sensor Based on <inline-formula> <tex-math notation="TeX">$\hbox{TiO}_{2}$</tex-math></inline-formula> Nanotubes: Influence of Stoichiometry Variation

Nanocrystalline TiO2 film based photoelectrochemical cell as self-powered UV-photodetector

Characterization and acetone gas sensing properties of electrospun TiO2 nanorods

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