Which dye is used in DSSC solar cell?
titanium dioxide nanoparticles
A modern n-type DSSC, the most common type of DSSC, is composed of a porous layer of titanium dioxide nanoparticles, covered with a molecular dye that absorbs sunlight, like the chlorophyll in green leaves. The titanium dioxide is immersed under an electrolyte solution, above which is a platinum-based catalyst.
How do dye sensitized solar cells work?
How does DSSC work?
- The dye is the photoactive material of DSSC, and can produce electricity once it is sensitized by light.
- The dye catches photons of incoming light (sunlight and ambient artificial light) and uses their energy to excite electrons, behaving like chlorophyll in photosynthesis.
What is used in dye sensitized solar cells?
Setup of a Dye Solar Cell The anode of a DSC consists of a glass plate which is coated with a transparent conductive oxide (TCO) film. Indium tin oxide (ITO) or fluorine doped tin oxide are most widely used. A thin layer of titanium dioxide (TiO2) is applied on the film.
How can you increase the efficiency of a dye sensitized solar cell?
To improve the efficiency of dye-sensitized solar cells (DSSCs),light absorption properties of organic dye must be tuned to have a maximum response throughout visible and near infra-red spectrum.
How does the nanocrystalline dye sensitized solar cells?
This dye-sensitized solar cell, also known as a Grätzel cell, uses a thin film of titanium dioxide which has been ground to a fine powder (nanocrystalline) to increase its reactive surface area. The TiO2 is sandwiched between two glass slides that are coated with conductive and transparent indium tin oxide (ITO).
What is meant by dye sensitized solar cell?
Dye-sensitized solar cells (DSSCs) use an organic dye to absorb incoming sunlight to produce excited electrons and create an energy which is then transferred to an inexpensive material, such as titanium dioxide (TiO2). From there, the energy is collected on a transparent conducting surface.
What is the role of electrolyte in dye sensitized solar cells?
The electrolyte is one of the most crucial components in DSSCs;(36) it is responsible for the inner charge carrier transport between electrodes and continuously regenerates the dye and itself during DSSC operation. The electrolytes must be able to transport the charge carriers between photoanode and counter electrode.
What are the advantages of dye sensitized solar cells compared to conventional solar cells?
Dye-sensitized solar cells (DSSCs) have many advantages over their silicon-based counterparts. They offer transparency, low cost, and high power conversion efficiencies under cloudy and artificial light conditions.
How does nanocrystalline dye sensitized solar cell resemble photosynthesis?
Nanocrystalline dye-sensitized solar cells is a photoelectrochemical cell that resembles natural photosynthesis in two respects: 1. It uses a natural dye like chlorophyll to absorb light and produce a flow of electrons, and 2. Like photosynthesis, it is a molecular machine.
How are dye molecules excited in dye sensitized solar cells?
Dye-sensitized solar cells based on ZnO nanowires: (a) schematic diagram of the cell and (b) current density as a function of bias. In dye-sensitized solar cells, after absorbing photon energy from the illuminated white light, the dye molecules become excited (D*) and inject electrons into the ZnO nanowires ( Fig. 5-4 ).
Can a dye sensitized solar cell be used on a rooftop?
In general terms the types of cells suitable for rooftop deployment have not changed significantly in efficiency, although costs have dropped somewhat due to increased supply. Operation of a Grätzel cell. In the late 1960s it was discovered that illuminated organic dyes can generate electricity at oxide electrodes in electrochemical cells.
How does a dye sensitized semiconductor work in a DSSC?
The basic working principle above, is similar in a p-type DSSC, where the dye-sensitised semiconductor is of p-type nature (typically nickel oxide). However, instead of injecting an electron into the semiconductor, in a p-type DSSC, a hole flows from the dye into the valence band of the p-type semiconductor.
Are there any drawbacks to making DSC solar cells?
Manufacturing of DSCs is simple, mostly low cost, and incorporate environmentally friendly materials. They have a good efficiency (about 10-14 %) even under low flux of sunlight. However, a major drawback is the temperature sensitivity of the liquid electrolyte.
