Research Proposal Dissertation Example | Topics and Well Written Essays - 1750 words

Research Proposal - Dissertation Examplesolar energy, if harness to its fullest, can provide the whole world with more than enough energy for a year, in just a single day. Science and technology is calm far from that point. Solar energy harnessing with todays inventions is still expensive and inefficient, making this a very exploitable seek field, with the promise of a better world. Solar energy will soon come out as a multibillion dollar industry, and only those nations will prosper through it, which spend time, efforts and money in this field today. Solar energy harnessing through photovoltaic cells is a very promising field. To enhance the efficiency, increasingly thin films be being prepared. PVs are make out of dope semiconducting materials, which have relatively high resistivity as compared to common good conductors. Thus, photovoltaic cells are coated with conducting materials on their get along. These are thin films themselves, whose sole purpose is to behave as a conduc ting medium. The coatings are done over the photovoltaic layers, such that they are present between the pass source and the photovoltaic layer. This means that the coatings have to be highly miasmal for light transmission as well. The materials employed for this purpose are termed as gossamer Conducting Oxides, which are nothing but doped oxides that have very high conductivity and transmission. TCOs may have a variety of functions, such as transparent electrical contacts, antireflection coatings and chemical barriers, in photovoltaic films (Perkins et. al. 20051). It is to be noted that the energy plenty gap theory suggests that transparency of a material is closely tie in to the electrical behavior of a material, more specifically its resistivity. Transparency of a material is higher if the band gap between the valence and conduction band is high. If the band gap is high, the resistivity is high too. Thus it is difficult to have both high transparency and low resistivity toge ther. To achieve this, doping is done in selected semiconductors, which can modify their properties to give us transparent layers with high conduction (Nave, 20102). A lot of research has been done in this field for over 50 years now and every project has led to the opening of a new chapter rather than closing out different chapters in the research. This is suggestive of the prospects of research in this field. The most important property of TCOs is their conductivity, and a lot of research has been done on that (Minami, 20003 Lewis and Paine, 20004) on aluminum doped zinc oxide, tin doped indium oxide, lead oxides, cadmium oxides, and their combinational oxides. These researches have indicated that there exists potential for engineered transparent conducting oxides to be formed with tailored properties (freewoman et. al. 20015). Transparency and light trapping has also been studied in detail in these papers. The main emphasis of the researches is to study composition-property beha viors. Some endeavors have also been made for synthesis and characterization of these thin films (Banarjee et. al. 20036 Coutts and Young, 20007 Gurumurugan et. al. 19948 Freeman et. al. 2001). Researchers have also used surface characterization techniques to study how electrical, chemical and transparency properties of TCOs depend on the surface layer. The electronic/defect structure of the surface layers has a huge impact on the electrical properties of the layer