Effect of TiO2 Compact Layer on DSSC Performance

Dye-sensitized solar cells offer an economically reliable and suitable alternative in moderating the challenges presented by the existing convectional photovoltaic cells. Whereas, for convectional solar cells the semiconductor adopts both the duty of light absorption and charge carrier transport, these two functions are separated in dye-sensitized solar cells. However, the efficiency of dye-sensitized solar cells has remained relatively low. For this reason, this research was aimed at how to increase the dye-sensitized solar cells performance. To achieve this, compact cover of TiO2 was deposited on a conductive glass substrate by using Holmarc’s Spray Pyrolysis system, using Ultrasonic Spray Head and spraying in vertical geometry, while TiO2 nanoparticles and nanotubes were deposited by screen printing technique on top of a transparent conducting FTO glass slide with or without the TiO2 compact layer. Transmission characteristics showed that introducing TiO2 compact layer on the conductive film lowers the transmission while reflectance properties were less than 15 % for all the prepared thin films. SEM micrographs showed that TiO2 nanotubes had a skein-like morphology with abundant number of nanotubes intertwined together to form a large surface area film. Solar cell performance properties revealed that introducing compact layer to dye-sensitized solar cells improved the performance by 145 % (from 1.31 % to 3.21 %) while TiCl4 treatment on compact layered dye-sensitized solar cells increased the efficiency by 28.79 % (from 0.66 % to 0.85 %)

Organic dye for dye-sensitized solar cells

Organic dye for a dye-sensitized solar cell (DSSC) comprising at least one electron-acceptor unit and at least one π-conjugated unit. Said organic dye is particularly useful in a dye-sensitized photoelectric transformation element which, in its turn, can be used in a dye-sensitized solar cell (DSSC)

Organic dye for dye-sensitized solar cells

Organic dye for a dye-sensitized solar cell (DSSC) comprising at least one electron-acceptor unit and at least one π-conjugated unit. Said organic dye is particularly useful in a dye-sensitized photoelectric transformation element which, in its turn, can be used in a dye-sensitized solar cell (DSSC)

Organic dye for dye-sensitized solar cell

Organic dye for a dye-sensitized solar cell (DSSC) comprising at least one electron-acceptor unit and at least one π-conjugated unit. Said organic dye is particularly useful in a dye-sensitized photoelectric transformation element which, in its turn, can be used in a dye-sensitized solar cell (DSSC)

Fabrikasi Dye Sensitized Solar Cell (DSSC) Berdasarkan Fraksi Volume TiO2 Anatase-Rutile Dengan Garcinia Mangostana Dan Rhoeo Spathacea Sebagai Dye Fotosensitizer

Sejak pertama kali dikembangkan, USAha untuk meningkatkan efisiensi Dye Sensitized Solar Cell (DSSC) terus dilakukan. Mulai dari pemilihan bahan pewarna, jenis semikonduktor yang digunakan, desain counter elektroda, struktur sandwich atau yang lainnya. Anatase dan rutile adalah fase dari TiO2 yang sering digunakan untuk fabrikasi DSSC. Penelitian ini menggunakan kulit manggis dan Rhoeo spathacea yang diekstrak menggunakan ethanol sebagai pewarna alami yang mengandung antosianin. Pewarna tersebut dikarakterisasi menggunakan UV-Vis dan FTIR, dan menunjukkan absorpsi pada panjang gelombang 392 nm untuk kulit manggis dan 413 nm untuk Rhoeo spathacea. TiO2 disintesis menggunakan metode co-precipitation. Ukuran partikel yang dihasilkan adalah 11 nm untuk anatase and 54,5 nm untuk rutile dengan menggunakan persamaan Scherrer. DSSC difabrikasi dengan variasi fraksi volume TiO2 anatase dan rutile. DSSC diuji dibawah cahaya matahari dengan daya sebesar 17 mW/cm2. Kurva arus-tegangan (I-V) DSSC yang dihasilkan fraksi volume 75%:25% memperlihatkan hasil terbaik dibanding yang lain. Efisiensi tertinggi adalah 0.037% dan 0.013% dihasilkan oleh DSSC dengan pewarna alami dari kulit manggis dan Rhoeo spathacea

Simulation of Solar Cell Efficiency using ATHENA and ATLAS

This dissertation is to report the simulation of solar cell using ATHENA and ATLAS. The report is divided into three sections according to the objectives of the project which are to simulate the P-N Junction Solar Cell, to detennine the optical properties of the materials in Dye-Sensitized Solar Cell and to simulate the efficiency of Dye-Sensitized Solar Cell at various titania, Ti02 particle size using ATLAS. Development of actual solar cell is costly. If the efficiency of the developed solar cell is low, it will generate low power and hence uneconomical to be practically used. Simulating the solar cell before the actual development of the solar cell can help to avoid producing solar cell with low efficiency. In this project, the scope is limited to basic P-N Junction Solar Cell and Dye-Sensitized Solar Cell. The P-N Junction Solar Cell which is the First Generation Solar Cell has been developed since 1954. Hence, the P-N Junction Solar Cell is very established and is used in this project to familiarize with ATHENA and ATLAS. Next, the project is continued to detennine the optical properties of the materials in the DyeSensitized Solar Cell via absorption spectroscopy. The data is then used to obtain the complex refractive index for the material in order to defme the properties of the materials in the ATLAS. From the obtained data, the Dye-Sensitized Solar Cell is then simulated using ATLAS. The simulation of the basic P-N Junction Solar Cell shows that Boron doping concentration, oxide layer thickness and metal contact area plays an important role to increase the efficiency of the solar cell. However, the doping concentration of Phosphorus does not significantly affect the solar cell performance. Next, our work shows that the absorbance of the titania/dye layer is optimum at titania particle size is around 20 nm. This results into higher values of absorption coefficient and extinction coefficient. Also, our calculation has shown that the titania particle size also affected the refractive index of the titania/dye layer. Lastly, the simulation of the Dye-Sensitized Solar Cell shows that the efficiency of the solar cell is highest when the titania particle size is at 20 nm. In order to verify our model of the Dye-Sensitized Solar Cell, we had measured the IV characteristics of the actual Dye-Sensitized Solar Cell. The comparison shows variations between the IV characteristics of the simulated Dye-Sensitized Solar Cell and the actual solar cell. However, the results of the simulated and actual cell show the same effect when the titania particle size is varied

Natural Dye Extracts of Areca Catechu Nut as dye Sensitizer for Titanium dioxide Based Dye Sensitized Solar Cells

A dye sensitized solar cell was fabricated using titanium dioxide nano particles sensitized by a new natural dye extracted from areca catechu nut. The natural dye extract contains tannin which is rich in gallotannic acid. The pure titanium dioxide nano particles in anatase phase were synthesized by sol-gel technique and were sensitized by the natural dye to yield photo anode material. The Powder X-Ray Diffraction, UV-vis spectra, Fourier Transform Infra Red spectroscopy, Energy Dispersive X- Ray spectroscopy and Scanning Electron Microscopy studies of pure and natural dye sensitized TiO2 were carried out to analyze their structural, optical, functional group, compositional and morphological details. The dye sensitized solar cell was fabricated using TiO2 nano particles coated on FTO glass plate which is sensitized by the natural dye as photo anode and platinum coated FTO as counter electrode. The natural dye sensitized solar cell showed a solar light energy to electron conversion efficiency of 0.76 %. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3431

Built Dye-Sensitized Solar Cells- A Confirmatory Test of a Mathematical Model

In their work, Efurumibe, et al (2012) developed a mathematical model of electron transport through the anode of a standard dye-sensitized solar cell. By analysis of the model, it was observed that the rate of electron trapping by the anode of the dye-sensitized solar cell decreases as the anode side increases. Here in this work, three different dye-sensitized solar cells (of different anode sizes) were built. When the cells were tested, it was observed that the cells with higher anode sizes gave increased current and voltage values. This confirmed the mathematical model as true. Key Words: Dye, Sensitized, solar, Cel

Terminalia catappa fruit pigments for dye sensitized solar cell applications

The dye sensitized solar cells have been assembled by using natural dye extracted from Terminalia catappa fruits. The photoelectrode for dye sensitized solar cell were prepared using green synthesized ZnO nanoparticles using doctor blade technique. The photoelectrode were sensitized using the extracted dyes. The fabricated solar cell exhibited short circuit current density of 4.9 mA and open circuit voltage of 0.472 V. The efficiency of the cell was found to be 1.58%. The photovoltaic performance of the constructed solar cell show good conversion efficiency. This indicates that Terminalia catappa fruit extracts can be used as an effective sensitizer.&nbsp

Enhance the performance of dye – sensitized solar cells by dipole molecules

Dye – Sensitized nanoporous Titanium dioxide (TiO2) solar cell is a promising electrochemical device for cost – efficient solar power conversion. This type of solar cell consists of a nanoporous TiO2 electrode coated with a monolayer of dye molecules, an electrolyte containing I-/I3- redox couple and a platinum counter electrode. Dye molecule acts as a sensitizer and the redox couple is used to regenerate the dye molecule. The effect of dipoles on the open – circuit voltage and short – circuit current density of the dye sensitized solar cell was systematically investigated. These parameters were enhanced by 3.8 % and 25.7 % respectively, and the overall performance of the solar cell was enhanced by 23.8 %