O2 plasma sintering study of TiO2 photoelectrodes in dye solar cells

Moraes, R.S.; Gonçalves, Agnaldo de Souza; Stegemann, C.; Sobrinho, Argemiro Soares da Silva; Miyakawa, Walter; Massi, M.

doi:10.1016/j.jpowsour.2017.05.025

Cited by 4 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first one is the temperature to completely remove the organic binders in the TiO 2 paste. 18 A TGA measurement was performed to identify the evaporation temperatures of different organic components in the TiO 2 paste as shown in Figure 2a. A rapid weight loss of 60% in the range of 80−150 °C is mainly caused by the evaporation of ethanol (as solvent to organic binders).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In the laser sintering process, three critical temperatures are needed. The first one is the temperature to completely remove the organic binders in the TiO 2 paste . A TGA measurement was performed to identify the evaporation temperatures of different organic components in the TiO 2 paste as shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

“…These methods includes flame annealing, UV irradiation, microwave irradiation, near infrared (NIR) heating, flame annealing and O 2 plasma sintering. 14,15,[18][19][20][21] Secondly, formation of a compact TiO 2 blocking layer using chemical methods also requires a temperature above 450C to achieve appropriate crystallization from amorphous phase, 22 although atomic layer deposition, thermal oxidation, TiCl 4 chemical bath deposition as well as electro-deposition have been also reported in the literature. 12, [23][24][25] Among various chemical techniques, spin coating and spray pyrolysis are two representative solution processes.…”

Section: Introductionmentioning

confidence: 99%

“…To date, several alternative methods have been introduced to replace the conventional furnace or oven sintering process for the DSSCs. These methods include flame annealing, UV irradiation, microwave irradiation, near-infrared (NIR) heating, and O 2 plasma sintering. ,,− …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO₂ Layers for Enhanced Performance of Dye-Sensitized Solar Cells

Hadi

Chen

Curioni

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Mesoporous TiO 2 structure (mp-TiO 2) with a compact TiO 2 blocking layer (bl-TiO 2) has been recognized as an effective photoanode for high performance dye sensitized solar cells (DSSCs). However, producing both mesoporous and compact TiO 2 layers by conventional methods requires high temperature furnace process via a two-step manufacturing route. Here, a one-step laser technique has been successfully developed to generate both mesoporous and compact TiO 2 layers on tin doped indium oxide (ITO) coated glass by a millisecond pulsed fiber laser with a wavelength of 1070 nm in ambient atmosphere. Compared with conventional furnace processes, the laser process exhibits a significant reduction of overall fabrication time from 5 h 20 min to 2 min. More importantly, the DSSCs fabricated by the laser process shows a remarkable improvement with the maximum power conversion efficiency (PCE) by 34% compared with the DSSCs fabricated by the furnace. The short-circuit current density (J sc) reaches 16.5 mA cm-2 for the DSSCs fabricated by the laser process while 10.6 mA cm-2 is obtained for that fabricated by the furnace process. The improvement is associated with the increased dye adsorption, decreased charge transfer resistance and increased electron lifetime of the TiO 2 photoanode fabricated by the laser process.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO₂ Layers for Enhanced Performance of Dye-Sensitized Solar Cells

Hadi

Chen

Curioni

et al. 2018

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

Efficient Photocatalytic Degradation of Pharmaceutical Pollutants Using Plasma‐Treated g‐C₃N₄/TiO₂

et al. 2020

View full text Add to dashboard Cite

A series of oxygen plasma–treated g‐C3N4/TiO2 nanotubes are prepared, which exhibit excellent photocatalytic performance for degrading pharmaceutical pollutants under simulated solar light irradiation. The structure and optical properties of photocatalysts are characterized using scanning electron microscope, transmission electron microscopy, X‐ray diffraction, UV–vis, atomic force microscopy, and X‐ray photoelectron spectroscopy analyses. The g‐C3N4 nanoparticles are coated on the surface of TiO2 forming a heterojunction structure, which extends the light‐absorption region and inhibits the recombination of electrons with holes. Ibuprofen is used as a model pharmaceutical pollutant. The heterojunction structure allows the g‐C3N4/TiO2 high photocatalytic efficiency that is two times larger than that of TiO2 nanotubes. The efficiency of g‐C3N4/TiO2 is further enhanced by oxygen plasma treatment. The oxygen plasma–treated g‐C3N4/TiO2 exhibits a photocatalytic efficiency of 95% within 90 min, which is much larger than that of TiO2 nanotubes (28%), g‐C3N4 (52%), and g‐C3N4/TiO2 nanotubes (70%). The kinetics of the photocatalytic degradation are also investigated. The plasma‐treated g‐C3N4/TiO2 exhibits the largest rate constant, which results from massive surface‐active species and surface oxygen. Finally, the structural evolution and reaction mechanism are investigated using molecular dynamics simulations, which offer a deep insight into the photocatalytic reaction.

show abstract

Two dimensional layered electron transport bridges in mesoscopic TiO2 for dye sensitized solar cell applications

Gopakumar

Menon

Ashok

et al. 2018

Electrochimica Acta

View full text Add to dashboard Cite

O2 plasma sintering study of TiO2 photoelectrodes in dye solar cells

Cited by 4 publications

References 33 publications

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO₂ Layers for Enhanced Performance of Dye-Sensitized Solar Cells

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO₂ Layers for Enhanced Performance of Dye-Sensitized Solar Cells

Efficient Photocatalytic Degradation of Pharmaceutical Pollutants Using Plasma‐Treated g‐C₃N₄/TiO₂

Two dimensional layered electron transport bridges in mesoscopic TiO2 for dye sensitized solar cell applications

Contact Info

Product

Resources

About

O2 plasma sintering study of TiO2 photoelectrodes in dye solar cells

Cited by 4 publications

References 33 publications

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO2 Layers for Enhanced Performance of Dye-Sensitized Solar Cells

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO2 Layers for Enhanced Performance of Dye-Sensitized Solar Cells

Efficient Photocatalytic Degradation of Pharmaceutical Pollutants Using Plasma‐Treated g‐C3N4/TiO2

Two dimensional layered electron transport bridges in mesoscopic TiO2 for dye sensitized solar cell applications

Contact Info

Product

Resources

About

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO₂ Layers for Enhanced Performance of Dye-Sensitized Solar Cells

One-Step Fiber Laser Fabrication of Mesoporous and Compact TiO₂ Layers for Enhanced Performance of Dye-Sensitized Solar Cells

Efficient Photocatalytic Degradation of Pharmaceutical Pollutants Using Plasma‐Treated g‐C₃N₄/TiO₂