Influence of nitrogen dopants on N-doped TiO2 electrodes and their applications in dye-sensitized solar cells

Guo, Wei; Shen, Yihua; Boschloo, Gerrit; Hagfeldt, Anders; Ma, Tingli

doi:10.1016/j.electacta.2011.02.091

Cited by 86 publications

(44 citation statements)

References 40 publications

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“…Guo et al reported that a peak 396.2 eV was attributed to a chemically bound N-species and a weak peak around 398.3 eV was derived from the presence of the O-Ti-N linkages in the crystalline TiO 2 lattice. In this work, the Ti2p core level peak had a binding energy of 458.6 eV which was in agreement with values reported in the literature [20]. SXPS and FTIR analyses confirmed the successful preparation of N-TiO 2 nanoparticles.…”

Section: Sxps Analysis Of N-tiosupporting

confidence: 91%

Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO2-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

et al. 2016

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photodegradation of bentazon. A bentazon removal efficiency of 90.1 % was achieved at pH 7. N-TiO 2 -PMAAg-PVDF/PAN membranes were successfully prepared and characterized. These photocatalytic membranes showed great potential as a technology for the effective removal of pesticides from water. According to literature, N-TiO 2 -PMAA-g-PVDF/PAN asymmetric photocatalytic membranes have not been prepared before for the purpose of treating agricultural wastewater.

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Section: Sxps Analysis Of N-tiosupporting

confidence: 91%

Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO2-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

et al. 2016

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“…The crystalline sizes of the synthesized samples are calculated by using the Scherrer equation D = Kλ/βcosθ, where D represented the crystal size, K represented the dimensionless shape factor (0.89), λ denoted the wavelength of the X-ray irradiation with 0.1541 nm for Cu Ka radiation, β expressed the half peak width and θ was Bragg's diffraction angle. 26 Those calculated results are collected in the Table II Laser Raman spectroscopy analysis.-Laser Raman spectroscopy (LRS) is one of the most effective methods to characterize the near surface structure of inorganic oxides, which is very sensitive to the response of the crystal structure. 27,28 Fig.…”

Section: Resultsmentioning

confidence: 99%

“…15 As a rareearth metal element investigated widely, lanthanum is effective to improve the photoelectric activity of TiO 2 . 16 Actually, there are few reports about doped TiO 2 for use in low temperature-based DSSCs. Ting et al 17 synthesized TiO 2 mesoporous beads doped with N by using a microwave-assisted method and fabricated low temperaturebased DSSCs, the η was found to be 4.81%, which was affected by Jsc.…”

mentioning

confidence: 99%

N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Yin

Chen

Zhang

et al. 2016

J. Electrochem. Soc.

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In this survey, N, La co-doped TiO 2 nanocrystals are synthesized through simple sol-gel method. Results reveal that both elements of N and La are introduced successfully into the structure of TiO 2 and exist as the form of La (Ti-O-La) bonds, N (N-Ti-O) bonds and N (Ti-O-N) bonds by several characterization analysis, thereby resulting in the formation of new impurity energy level between the forbidden bands, and great enhancement of light absorption ability in visible light region. These resulting samples are fabricated for low-temperature-based dye-sensitized solar cells (DSSCs), and the highest temperature of the whole process is 120 • C. EIS, Bode plot and I-V analysis are employed to measure photovoltaic performance of DSSCs. The photoelectric conversion efficiency (η) of DSSCs with co-doped TiO 2 materials as the photoanode is 5.33%, and when compared to pure TiO 2 -based cell (4.02%), the η is increased by 32.6%. Dye-sensitized solar cells (DSSCs) have attracted a lot of research interest due to the low-cost, easy fabrication, good stability, and high photoelectric conversion efficiency.1 However, the traditional fabrication procedure of DSSCs requires not only the heavy FTO substrate, but also a high temperature calcination process at about 500 • C. These will limit the large area production and commercial application of DSSCs. In order to overcome these problems, flexible DSSCs with their incomparable advantages have attracted more interest of scientists, 2 compared with the traditional high temperaturebased DSSCs. By using the flexible substrate, the high temperature calcination process is not needed, which can save energy and reduce the production cost. More importantly, a wide range of flexible substrates can be applied in the fabrication of flexible DSSCs. Generally, the transparency of the solar cell substrate need to be more than 80%, and thus only FTO can be employed in the high temperature-based DSSCs. For the low temperature-based DSSCs, the substrate can involve FTO, ITO-PET (ITO-coated pol(ethylene terephthalate), ITO-PEN (ITO-coated polyethylene naphthalate), Ti foil and Ti meshes, [3][4][5] ZnO/Al thin film with high transmittance, 6 etc. It is believed that the cell based on the flexible substrate should possess the merits of being light weight, foldable and easy to carry, and thus can be used in portable electronic products. Furthermore, the cell preparation process is simple and suitable for industrial roll-to-roll mass production. It is known that the fabrication of photoanode at low temperature is essential for these flexible DSSCs. The paste employed for the generation of photoanode does not have to undergo a high temperature (about 500• C) annealing process, since no organic materials are introduced. After a slight agitation, the paste could be dried at low temperature(<150• C). Unfortunately, it is reported that the short-circuit current (J sc ) is low without the high temperature calcination process, which is the main reason for the poorer efficiency realized for the low temperatur...

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“…The intrinsic band gap of TiO 2 (3.2 eV) and high recombination rate of photogenerated electron-hole pairs are the main drawbacks limiting the future improvement of photochemical activity. Various attempts such as substitution element doping (Ref [12][13][14] and surface modification with noble metal and semiconductor (Ref [15][16][17] have been successfully tried to overcome the two obstacles. Electrophoresis deposition method (EPD) is a simple method for the preparation of nanostructure films on the conductive substrates.…”

Section: Introductionmentioning

confidence: 99%

Improving Electron Transfer from Dye to TiO2 by Using CdTe Nanostructure Layers in Dye-Sensitized Solar Cells

Beshkar

Sabet

Salavati‐Niasari

2015

J. of Materi Eng and Perform

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In this work, TiO 2 P25 was deposited successfully on the FTO glass by electrophoresis method. Different chemical methods were served for deposition of nanosized CdTe such as successive ion layer adsorption and reaction (SILAR) and drop-cast. Dye-sensitized solar cells were fabricated from prepared electrodes, Pt as a counter electrode, dye solution, and electrolyte. The effects of chemical deposition methods were investigated on the surface quality, optical properties, and solar cell efficiency. It was observed that deposition method has an important role on the solar cell performance. It was also seen that deposition method affects directly on surface thickness and the amount of dye adsorption. In fact, each deposition method creates different surfaces, and hence, they act variously in electron transfer across the electrode surface. Among different deposition methods that were used in this experimental work, SILAR method showed the best performance and the surface that was created by this method could transfer the electrons across the electrode faster than the other ones. But this chemical method cannot improve solar cell efficiency due to some different reasons that we mentioned in this paper.

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Influence of nitrogen dopants on N-doped TiO2 electrodes and their applications in dye-sensitized solar cells

Cited by 86 publications

References 40 publications

Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO2-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO2-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Improving Electron Transfer from Dye to TiO2 by Using CdTe Nanostructure Layers in Dye-Sensitized Solar Cells

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Influence of nitrogen dopants on N-doped TiO2 electrodes and their applications in dye-sensitized solar cells

Cited by 86 publications

References 40 publications

Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO2-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

Preparation of photo-catalytic copolymer grafted asymmetric membranes (N-TiO2-PMAA-g-PVDF/PAN) and their application on the degradation of bentazon in water

N, La Co-Doped TiO2for Use in Low-Temperature-Based Dye-Sensitized Solar Cells

Improving Electron Transfer from Dye to TiO2 by Using CdTe Nanostructure Layers in Dye-Sensitized Solar Cells

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N, La Co-Doped TiO₂for Use in Low-Temperature-Based Dye-Sensitized Solar Cells