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.

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 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.

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.

scholarly journals Dye Sensitized Solar Cell using natural dye as light harvesting sensitizer

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Samia Tabassum ◽  
Ayesha Siddika ◽  
Munira Sultana ◽  
Mashudur Rahaman ◽  
Muhammad Shahriar Bashar
Keyword(s):  
Dye Sensitized Solar Cells ◽  
Nir Spectroscopy ◽  
Natural Dyes ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Dye Absorption ◽  
Sensitized Solar Cells ◽  
Day By Day

Due to the availability, non-toxicity and cost-effectivity, natural dyes are becoming popular day by day. In this study, dye-sensitized solar cells (DSSCs) were fabricated using natural dyes containing anthocyanins extracted from pomegranate, blackberry and beet route. TiO2 film on FTO glass prepared by doctor blade method was employed as photoanode. The structural and morphological properties of photoanode was studied using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The extracted dye absorption was evaluated by UV-Vis-NIR spectroscopy. The fabricated cells have efficiency in the range of 0.015 – 0.042% which has been measured by sun simulator.

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.

Optimum Reduced Graphene Oxide (rGO) Volume for Hydrothermal Synthesis of Titanium Dioxide (TiO2) Nanostructure Direct Growth on Fluorine-Doped Tin Oxide (FTO)/rGO Substrate

2020 ◽  
Vol 17 (2) ◽  
pp. 886-892
Author(s):  
A. Talib ◽  
M. K. Ahmad ◽  
N. Ahmad ◽  
N. Nafarizal ◽  
F. Mohamad ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Solar Cells ◽  
Solar Cell ◽  
Reduced Graphene Oxide ◽  
Dye Sensitized Solar Cells ◽  
X Ray ◽  
Dye Sensitized ◽  
Reduced Graphene ◽  
Sensitized Solar Cells

Titanium dioxide or titania shows a great interest in solar cell application due to its morphology and crystalline structure. Moreover, it is an affordable compound that could make solar cells more cost economical than traditional silicon solar cells. In this study, the influence of rutile Titanium Dioxide (TiO2) deposit on reduced Graphene Oxide (rGO) as photoanode through one-step hydrothermal technique is demonstrated to synthesis rutile TiO2 nanorods (NRs) and nanoflowers (NFs) morphology in nanoscale dimension with different rGO volume for Dye-sensitized solar cells (DSSCs) application. The successful synthesis of TiO2 on FTO/rGO was confirmed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) spectroscopy, ultraviolet-visible (UV-Vis) spectrophotometry and incident photon-to-current conversion efficiency (IPCE) spectra. The performance of dye-sensitized solar cells as outcome of rGO contents in solar cell was also examined. The optimal performance result in contrast with liquid electrolyte based solar cell has been approved over photovoltaic performance study in terms characteristics of open circuit voltage (Voc), short circuit current (Jsc) and solar conversion efficiency.

scholarly journals The cause for the low efficiency of dye sensitized solar cells with a combination of ruthenium dyes and cobalt redox

2015 ◽  
Vol 17 (15) ◽  
pp. 10170-10175 ◽  
Author(s):  
Keita Omata ◽  
Shota Kuwahara ◽  
Kenji Katayama ◽  
Shen Qing ◽  
Taro Toyoda ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Low Efficiency ◽  
Ruthenium Dyes ◽  
Sensitized Solar Cells

What makes the efficiency of the solar cell lower for the Ru dye and the Co redox combination?

Donor-π-acceptor, triazine-linked porphyrin dyads as sensitizers for dye-sensitized solar cells

2015 ◽  
Vol 19 (01-03) ◽  
pp. 175-191 ◽  
Author(s):  
Ganesh D. Sharma ◽  
Galateia E. Zervaki ◽  
Kalliopi Ladomenou ◽  
Emmanuel N. Koukaras ◽  
Panagiotis P. Angaridis ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Carboxylic Acid ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Orbital Energy ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Two porphyrin dyads with the donor-π-acceptor molecular architecture, namely ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which consist of a zinc-metalated porphyrin unit and a free-base porphyrin unit covalently linked at their peripheries to a central triazine group, substituted either by a glycine in the former or a N-piperidine group in the latter, have been synthesized via consecutive amination substitution reactions of cyanuric chloride. The UV-vis absorption spectra and cyclic-voltammetry measurements of the two dyads, as well as theoretical calculations based on Density Functional Theory, suggest that they have suitable frontier orbital energy levels for use as sensitizers in dye-sensitized solar cells. Dye-sensitized solar cells based on ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ) have been fabricated, and they were found to exhibit power conversion efficiency values of 5.44 and 4.15%, respectively. Photovoltaic measurements (J–V curves) and incident photon to current conversion efficiency spectra of the two solar cells suggest that the higher power conversion efficiency value of the former solar cell is a result of its enhanced short circuit current, open circuit voltage, and fill factor values, as well as higher dye loading. This is ascribed to the existence of two carboxylic acid anchoring groups in ( ZnP )-[triazine-gly]-( H 2 PCOOH ), compared to one carboxylic acid group in ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which leads to a more effective binding onto the TiO 2 photoanode. Electrochemical impedance spectra show evidence that the ( ZnP )-[triazine-gly]-( H 2 PCOOH ) based solar cell exhibits a longer electron lifetime and more effective suppression of charge recombination reactions between the injected electrons and electrolyte.

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