scholarly journals The Influence of Titania Electrode Modification with Lanthanide Ions Containing Thin Layer on the Performance of Dye-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Maciej Zalas ◽  
Maciej Klein
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Modified Electrodes ◽  
Lanthanide Ions ◽  
X Ray Diffraction ◽  
Photoexcited Electron ◽  
X Ray ◽  
Dye Sensitized ◽  
Back Transfer ◽  
Sensitized Solar Cells

The lanthanide and scandium groups ions (except Pm and Ac) have been used as dopants of TiO2film in dye-sensitized solar cells. The X-ray diffraction spectra show that the modification has no influence on the structure of the electrode; however, the diffuse reflectance UV-Vis measurements exhibit significant changes in the electronic properties of modified electrodes. The appearance of energy barrier preventing photoexcited electron back-transfer was confirmed for Sc, Ce, Sm, Tb, Ho, Tm, and Lu modified cells. The best photoconversion performance of 8.88 and 8.80% was found for samples modified with Ce and Yb, respectively, and it was greater by 31.4 and 30.2% than that of a unmodified cell.

Fabrication and Characterization of TiO2 Nanotubes for Dye-Sensitized Solar Cells

2015 ◽  
Vol 1131 ◽  
pp. 215-220
Author(s):  
Emmanuel Nyambod Timah ◽  
Buagun Samran ◽  
Udom Tipparach
Keyword(s):  
Solar Cells ◽  
Anatase Phase ◽  
Dye Sensitized Solar Cells ◽  
Ammonium Fluoride ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Dc Power ◽  
Sensitized Solar Cells

TiO2nanotubes were successfully synthesized by anodization method of Ti foils. The electrolyte was composed of ethylene glycol (EG), ammonium fluoride (0.3%wt NH4F) and de-ionized water (2% vol H2O). A constant DC power supply of 50 V was used during anodization with anodizing times of 1 hour, 2 hours, 4 hours and 6 hours. The samples were annealed at 450 °C for 2 hours. The TiO2nanotubes were studied by X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). Structural analysis revealed the presence of pure Ti, and the crystalline anatase phase due to transformation of amorphous TiO2after annealing. The morphology of TiO2nanotube sizes showed an increase in tube diameter with anodizing time from approximately 50 nm to 200 nm. However, the efficiency of dye-sensitized solar cells increased with anodizing times up to a maximum of 5.74 % for anodizing time of 4 hours.

scholarly journals Dye-Sensitized Solar Cells Based onBi4Ti3O12

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Zeng Chen ◽  
Shengjun Li ◽  
Weifeng Zhang
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Photovoltaic Properties ◽  
X Ray ◽  
Glass Substrates ◽  
Dye Sensitized ◽  
Response Range ◽  
Sensitized Solar Cells

Bismuth titanate (Bi4Ti3O12) particles were synthesized by hydrothermal treatment and nanoporous thin films were prepared on conducting glass substrates. The structures and morphologies of the samples were examined with X-ray diffraction and scanning electron microscope (SEM). Significant absorbance spectra emerged in visible region which indicated the efficient sensitization of Bi4Ti3O12with N3 dye. Surface photovoltaic properties of the samples were investigated by surface photovoltage. The results further indicate that N3 can extend the photovoltaic response range of Bi4Ti3O12nanoparticles to the visible region, which shows potential application in dye-sensitized solar cell. As a working electrode in dye-sensitized solar cells (DSSCs), the overall efficiency reached 0.48% after TiO2modification.

Light Trapping in Dye Sensitized Solar Cells with Length-Modulated TiO2 Nanotubes

2011 ◽  
Vol 685 ◽  
pp. 82-86 ◽  
Author(s):  
Cheng Shen ◽  
Ling Shen ◽  
Jie Yang ◽  
Jian Wei Shi ◽  
Fei Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Trapping ◽  
Anatase Phase ◽  
Dye Sensitized Solar Cells ◽  
Visible Spectrum ◽  
Photocurrent Density ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Highly Oriented TiO2Nanotube (NT) Arrays Were Fabricated by Anodizing Ti Foils. the Morphology of the NT Arrays Was Characterized by Scanning Electron Microscope. by Adjusting the Anodization Time, the Lengths and Diameters of TiO2NT Arrays Changed from 6.7 to 19.5 μm, and 90 to 110 Nm, Respectively. as Confirmed by X-Ray Diffraction and Raman Spectra, the as-Anodized TiO2NTs Were Amorphous but Transformed into Anatase Phase after Annealing at 450°C for 3 H. Reflectance Spectrum of TiO2NT Arrays Showed that NT Layer of Longer Length Lowered the Reflectance in the Visible Spectrum because of Light Trapping Effects of NTs, Thus Enhancing Light Harvesting of NTs. Dye-Sensitized Solar Cells Were Fabricated Using TiO2NT Arrays with Different Tube-Lengths. Analysis of Photocurrent Density-Voltage (J-V) Characteristics Showed that Higher Photoconversion Efficiencies Were Achieved with Longer NT Lengths.

scholarly journals Preparation and Characterisation of ZnO/NiO Nanocomposite Particles for Solar Cell Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
S. Kerli ◽  
Ü. Alver
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Dye Sensitized Solar Cells ◽  
Hexagonal Wurtzite Structure ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Ruthenium Dyes ◽  
Sensitized Solar Cells

The mixture of ZnO and NiO effect on solar cell has been investigated. ZnO and NiO particles were produced by hydrothermal method and the produced particles were annealed at 500°C for 1 hour. Crystal structure and morphological properties of particles were examined by X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD measurements showed that ZnO particles have a hexagonal wurtzite structure and NiO particles have a cubic structure. SEM results show that both ZnO and NiO particles are the form of nanoparticles. Dye-sensitized solar cells were fabricated by N-719 (Ruthenium) dyes and mixing ZnO/NiO particles in different ratios, 100/0, 50/50, and 0/100. It was observed that the solar cells made with ZnO have the highest performance with the efficiency of 0.542%. In addition, it was observed that when amount of NiO ratio increases in the mixture of ZnO/NiO, the efficiencies of DSSCs were observed to decrease.

X-ray Characterization of Dye Adsorption in Coadsorbed Dye-Sensitized Solar Cells

2013 ◽  
Vol 117 (33) ◽  
pp. 17033-17038 ◽  
Author(s):  
Mitsunori Honda ◽  
Masatoshi Yanagida ◽  
Liyuan Han ◽  
Kenjiro Miyano
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Dye Adsorption ◽  
X Ray ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

CuO Nanostructure by Oxidization of Copper Thin Films

2008 ◽  
Vol 55-57 ◽  
pp. 645-648
Author(s):  
Phathaitep Raksa ◽  
A. Gardchareon ◽  
N. Mangkorntong ◽  
Supab Choopun
Keyword(s):  
Thin Films ◽  
Oxidation Reaction ◽  
Dye Sensitized Solar Cells ◽  
X Ray Diffraction ◽  
Copper Thin Film ◽  
X Ray ◽  
Sem Image ◽  
Dye Sensitized ◽  
Cuo Nanostructure ◽  
Sensitized Solar Cells

CuO nanostructures were synthesized by oxidizing copper thin films. The copper thin film was grown on alumina substrates by evaporation copper powder at pressure of 0.04 mtorr. The copper thin films were then oxidized 800, and 900oC for 12, 24 and 48 hr, respectively. The obtained CuO nanostructures were investigated by Energy Dispersive Spectroscopy (EDS), Field Emission Scanning Electron Microscope (FE-SEM) image, and X-Ray Diffraction (XRD). The diameter of CuO nanostructure is around 100-600 nanometers and it is depends on oxidation reaction time and temperature. These CuO nanostructures have a potential application for nanodevices such as nano gas sensor or dye-sensitized solar cells.

Hydrothermal Preparation and Characterization of ZnO with Various Morphologies for Dye-Sensitized Solar Cells

2013 ◽  
Vol 750-752 ◽  
pp. 873-876
Author(s):  
Zong Hu Xiao ◽  
Wei Zhong ◽  
Shun Jian Xu ◽  
Yong Ping Luo
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Zinc Nitrate ◽  
X Ray Diffraction ◽  
Hydrothermal Preparation ◽  
Dye Sensitized ◽  
20 Nm ◽  
Sensitized Solar Cells

Zinc oxide (ZnO) with various morphologies consisting of nanoparticles with a diameter of approximately 20 nm have been successfully prepared by hydrothermal method from zinc nitrate (Zn (NO3)2)/carbamide (CO(NH2)2) solution. The morphologies and phase structures of the as-prepared ZnO samples were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD). Results show that the morphologies of the as-prepared ZnO are successively present in broom-like, cabbage-like, chinese cabbage-like, honeycomb-like with the increase of the CO(NH2)2concentration from 0.1 M to 1 M. The photovoltaic performances of dye-sensitized solar cells, based on ZnO with various morphologies as the photoelectrodes, are unobvious. With the morphologies of ZnO evolving, the short circuit photocurrent density (Jsc) increases from 2.35 to 3.72 mA/cm2, the fill factor (FF) increases from 0.400 to 0.570, and the corresponding conversion efficiency (η) varies from 0.520 % to 1.200 %. The lowηmay be due to the formation of the Zn2+/dye polymers.

scholarly journals Development of Well-Aligned TiO2Nanotube Arrays to Improve Electron Transport in Dye-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Kyung-Ho Chung ◽  
Md. Mahbubur Rahman ◽  
Hyun-Seok Son ◽  
Jae-Joon Lee
Keyword(s):  
Solar Cells ◽  
Electrochemical Impedance ◽  
Transparent Conducting Oxide ◽  
Dye Sensitized Solar Cells ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
Dye Sensitized ◽  
Transmission Electron ◽  
Back Electron Transfer ◽  
Sensitized Solar Cells

We fabricated well-aligned one-dimensional (1-D) titania nanotubes (TNT) on transparent conducting oxide (TCO) by anodization of Ti foil. Different lengths of TNTs were prepared by varying the applied potential (70 V) time, and we investigated the performance of these TNTs in dye-sensitized solar cells (DSSCs), transplanted onto a 6 μm TNP adhesion layer. The fabricated TNTs arrays (length 15 μm) photoelectrode showed 24% increased efficiency compared to the TNP photoelectrode of 17 μm thickness. We further investigated the performances of DSSCs for the TNTs (1 wt%) incorporated TNP photoelectrode and obtained 22% increased efficiency. The increased efficiency of the pure TNTs arrays and TNT-mixed TNP photoelectrodes was attributed to the directional electron movement of TNTs and light scattering effect of the TNT with the decreased rate of back electron transfer. The anodized and fabricated TNTs and DSSCs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and electrochemical impedance spectroscopy (EIS).

scholarly journals Natural dyes from amazon forest: potential application in dye-sensitized solar cells

2021 ◽  
Vol 26 (2) ◽  
Author(s):  
Moisés do Amaral Amâncio ◽  
Ellen Raphael ◽  
Yonny Romaguera-Barcelay ◽  
Maria Oneide Silva-Moraes ◽  
Camila Macena Ruzo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Semiconductor Layer ◽  
Amazon Forest ◽  
Euterpe Oleracea ◽  
X Ray Diffraction ◽  
Dye Sensitized ◽  
Vis Spectroscopy ◽  
Arrabidaea Chica ◽  
Sensitized Solar Cells

ABSTRACT In this work, plant dyes extracted from Amazon Forest are applied as a sensitizer in Dye-Sensitized Solar Cells. The selected plants were Euterpe oleracea, Arrabidaea chica, Bixa orellana, Genipa Americana, and Myrcia sylvatica, and the dyes were collected from fruits, leaves, seeds, pulp and seeds and stalk scrapings respectively. Characterization studies by the UV-vis spectroscopy made it possible to know the absorption spectra of each plant dye, and the X-ray diffraction technique allows the structural characterization of the nanostructured semiconductor layer. The solar cells were characterized according to their efficiency parameters (Voc, Jsc, FF and ? (%)), obtained from the current vs voltage curves. Such parameters proved to be modest, presenting Voc and Jsc values over 0.334 volts and 0.452 mA/cm2 for a photosensitized cell with the dyes extracted from Genipa americana. In this way, it was possible to verify the photoelectrochemical potential of the dyes extracted from plants of the Amazon Forest.

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