REVIEW OF HYBRID SOLAR CELLS BASED ON CdSe AND TiO2 MATERIALS
|Dr.Mrunal Deshpande, Dr.R.Seyezhai
Associate Professor, Department of EEE, SSN College of Engineering, Chennai, India
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Renewable energy sources are gaining popularity and have become the most preferred topic for research. Among the renewable energy sources available, sunlight is free and abundant and the solar photovoltaic (PV) systems can be installed anywhere as per the need. The PV systems convert light into electricity by using semiconductor technology. But the conventional solar cells suffers from two main problems. It can only achieve efficiencies around ten percent and their manufacturing cost is high. The first drawback, inefficiency, is almost unavoidable with silicon cells. This is because the incoming photons, or light, must have the right energy, called the band gap energy, to knock out an electron. If the photon has less energy than the band gap energy, then it will pass through. If it has more energy than the band gap, then that extra energy will be wasted as heat. To increase the efficiency and reduce the cost of a PV system, an introduction of combination of polymer and nanoparticles in cell design is fast replacing the silicon PV modules. An overview of this new technology confined to CdSe and TiO2 is presented in this paper. The properties and the advantages of the hybrid solar cell employing CdSe and TiO2 have been discussed in detail.