Semiconducting thick films for photovoltaic applications

In this modern age, it is evident that the materials of high transparency and low electrical resistivity are very important for the photovoltaic applications, so there is huge demand for low cost transparent conducting oxide (TCO) films. The increasing demand for renewable energies due to the limited availability of fossil and nuclear fuels and due to growing environmental problems. The best way of utilizing solar energy is to convert solar energy directly to electricity through the use of photovoltaic. Sunlight, like all other electromagnetic radiations, consists of photons, photons have energy more than band gap energy of semiconductor (Eg) and they will insert electron hole pairs in the semiconductor and contribute to the energy conversion process. Thick/thin films of II-VI semiconductors exhibit high efficiencies, they have high absorption co-efficient and have direct band gap, the values of which correspond to the wide range of solar spectrum. This makes them promising materials for the photovoltaic device application. In this book, we have discussed screen printing technique, which is as simple and low cost technique for fabricating semiconducting layers for PV devices etc