Sensitized solar cells based on natural dyes (original) (raw)
Related papers
Construction and Characterization of Dye-Sensitized Solar Cells
Journal of Materials Science and Engineering B, 2013
This work describes the development of solar cells manufactured with different natural dyes, with the purpose to determine their photoelectrochemical properties, employing for that virtual instrumentation. Data acquisitions and statistical process of the same, are realized through graphical programming software. The system has facilities for measurements, acquisitions and to see permanently in the computer display, information about the performance of the solar cells, as well as environmental parameters such as; temperature and the I-V characteristic curve of the solar cell. This monitoring system pretends to be part of a permanent station for monitoring variables of the manufactured solar cells.
Preparation and Performance Study of Dye Sensitized Solar Cells Using Colorful Natural Dyes
With the world heating towards a major fuel crisis (storage and cost), alternative sources of fuel has become a major research area recently, in almost all disciplines of science. The nuclear and hydrogen based posing problems for use, much attention has now been focused on other non-conventional energy like wind, water, geothermal and solar energy. NDSSCs show the most promising future due to their, independent, environmentally friendly, low maintenance and low cost. Furthermore, NDSSC offers the possibility of various colours and attractive designs such as semitransparent modules. In this study, a photo-electrode using Mg doped TiO2, Bi doped TiO2, Al doped TiO2 and ZnO doped TiO2 nanopaste was coated on FTO glass plate by doctor-blade method. The analyze optical absorption and functional groups of prepared natural dyes such as Krishna Tulsi (Ocimum sanctum), Rama Tulsi (Ocimum sanctum) and Vana Tulsi (Ocimum gratissimum) are analysis by using UV-Visible and FT-IR spectroscopy. In the FT-IR spectra exhibit peaks corresponding to specific functional group present in samples. The optical properties and surface morphology of dyed photoanode were analyzed by using UV-Visible spectroscopy, PL-studies and FE-SEM analysis. Finally photocurrent-voltaic characterization of fabricated nanocrystalline natural dye solar cells were studied by using J-V curves. It was found that the levels of short-circuit current (Jsc), open-circuit voltage (Voc), fill factor (FF) and overall conversion efficiency (η) of fabricated cells for different natural dyes.
Recent Progress in Dye Sensitized Solar Cells
The article summarizes the recent trends in solar cells particularly in the field of Dye Sensitized Solar Cell. The DSSC we would refer for short for Dye Sensitized Solar Cell. The Dye Sensitized Solar Cell is the recent trend in the field of solar photo voltaic electricity generation. The Solar Cells captures the solar radiation and he photovoltaic material convert those solar radiations to the usable voltage which could be used for various purpose. The conventional method using in this regard consists of the use of Silicon wafer photovoltaic solar cell which is way too costly to be used. The most efficient way to achieve the objective (cheaper solar energy) is to replace the Silicon from the PV Solar Module (Silicon being the most costly material of the module) with any other chemical or element which is abundantly available in nature and also is very cost effective. Titanium Dioxide (Ti02) is one major compound which can be used to replace Silicon along with the Ruthenium Dye. Apart from presently being many methods for a generation or harnessing solar energy, the Dye Sensitized Solar Cells or DSSCs have acquired the attention of a much wider section of scientists and engineers working in this field. Due to its greater and wider working capability in the solar UV Spectrum ad future scope of the material and porous structure and semiconducting behavior, the mesoporous titania made Dye Sensitized Solar Cells are widely expected to be used in innovative applications. INTRODUCTION The recent trend and availability of the current deposit of fossil fuels stocks availability within the planet is seeking and urge for the change of power generation need. The environmental impact of the current rate of use of fossil fuels fulfilling our energy and power requirements have an urge for the switch to the non-conventional and renewable source of energy to meet our power requirements [1]. As per an estimation, the energy requirement is to get doubled by the year 2050 because of the rapid population growth and industrialization [2]. The worldwide concern for environmental aspect for major energy production in the country is coal based, which has major environmental impact. Thus, the geothermal energy, hydrothermal energy, nuclear energy, wind energy, biomass energy, etc i.e. carbon free energy production method is getting momentum [3]. However, light from the Sun is the major source of renewable energy as solar energy. Moreover, the efficiency and the cost of the solar energy production is the major barrier in a step toward environmentally friendly energy production method. Among all the renewable sources of energy available to us for the exploitation to meet our energy requirements, Solar Energy seems to be most promising, quiet and clear form of energy with the all the available technologies we possess [4]. The Solar radiations incident on the Earth's surface has the capability to generate and power equivalent to 1, 20,000 TW, which is sufficient to meet all our energy requirements [5]. Thus, all those methods or technologies available to us which can harness the solar energy is of the extreme category of importance to us [6].
Journal of Engineering Science and Technology Review, 2012
Dye-sensitized solar cells (DSSCs) are placed in third generation photovoltaics and are proposed as alternatives to conventional solar cells of silicon. DSSCs have numerous advantages over silicon based solar cells such as low materials cost, ease of production, and efficiencies out performing amorphous silicon solar cells. As these cells can be printed on glass, they can uniquely offer a high degree in freedom for the design and the optical appearance of a buildingintegrated module. The cell concept is believed to reduce the production costs and energy payback time significantly compared to standard silicon cells or other thin film cells. Although the efficiency record of single cell is 12% the conversion efficiency on larger areas is still an issue to be solved before this technology will follow the production line. Along with the up-scaling of DSSCs, open circuit voltage and fill factor of DSSCs may rapidly decrease with the increase of shunt current and internal resistance. If the design methods and techniques of these cells are not optimized appropriately, the efficiency of the cell is likely lower than 1% when the size is up to 10cm x 10cm. In this work we present studies on the DSSC efficiency depending on their size. We focus on the efficiency of cells in shape of long strips with varying their length from 1 to 20 cm while their width is always kept constant to 1 cm. Extensive studies on the open circuit voltage-Voc, short circuit current density-Jsc, fill factor-ff and overall efficiency-n% of the cells will be presented.
Dye-sensitized solar cells with conversion efficiency of 11.1%
… Journal of Applied …, 2006
Dye-sensitized solar cells (DSCs) using titanium dioxide (TiO 2 ) electrodes with different haze were investigated. It was found that the incident photon to current efficiency (IPCE) of DSCs increases with increase in the haze of the TiO 2 electrodes, especially in the near infrared wavelength region. Conversion efficiency of 11.1%, measured by a public test center, was achieved using high haze TiO 2 electrodes. This indicates that raising the haze of TiO 2 electrodes is an effective technique for improvement of conversion efficiency.
A Study from Junk Market to the Production of 5.25 Efficient Dye-Sensitized Solar Cells
Selcuk University Journal of Engineering ,Science and Technology, 2018
This paper reveals that having limited facilities is just an excuse not to do any experimental research in most of the universities and institutions all over the world. This may sound impractical for developed countries; however, it is one of the most fundamental problems for underdeveloped and even for some of the developing countries. In this paper, a study of building a laboratory mostly using homemade devices from junks is explained. This paper might be a good and encouraging reference especially for low-income countries, some universities/institutions with very limited budget around the world as well as some students/researchers who want to have their own tools to conduct a research. After a brief explanation to build some of the tools using junks, the production of dye-sensitized solar cells using homemade equipments with up to 5.25% power conversion efficiency (PCE) will be demonstrated under AM1.5 simulated light emission. Structural, electrical and photovoltaic properties of the fabricated devices will also be investigated using scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD), and current-voltage (IV) characterization tools in this paper.
Transstellar Journal , 2019
The stronger thrust on the use of renewable energy by phasing out the dependence on fossil fuels has led to an intensive research in the field of solar photovoltaics with much emphasis on materials and methods that could greatly bring down the cost of solar cells through the incorporation of suitable technologies involving greener materials that are believed to be both nature and pocket friendly. Dye sensitized solar cells are a fast emerging technology trend in the field of utilization of the ever shining bundle of enormous green energy, sun. Recent advances in the field of material science have enabled these cells to compete against the traditional silicon solar cells. The present paper discusses the effect of utilization of the oxides of various other D-group elements in the periodic table such as Manganese Chromium, and the most commonly used Titanium, as the material for the absorption of the dye. The paper also compares the performance of three different natural dyes derived out of spinach, grape and pomegranate. The current work also evaluates the performance of the cell under the application of both solid and liquid electrolyte in the form of fused salt and iodide electrolytes respectively. The fabricated dye sensitized solar cells are grouped and coded for easy recognition and are exposed to sunlight for a particular length of time. The voltage generated is measured with the help of a calibrated multimeter. The results indicate that manganese dioxide used for dye absorption performs at par with titanium dioxide, while chromium trioxide fails miserably in this regard. Also, dark colored dyes generated higher voltage in comparison with light colored dye.