The Effect Of Solar Energy On Silicon Solar Cell Technology

759 WordsNov 16, 20154 Pages
Solar energy is widely believed to be the most promising renewable energy source to fulfill the ever-increasing energy demand from human society now and into the future. Dye-sensitized solar cells (DSSCs) have been explored as a potentially low-cost alternative to silicon solar cell technology due to their lower fabrication costs compared to crystalline semiconductor photovoltaics. However, the optimized efficiency for DSSCs has not been achieved yet, and the chemical stability between dye and semiconductor has also not been addressed completely. In this research, we applied the following four main strategies to prepare photoanodes used in DSSCs with the aim of improving stability and efficiency: 1) utilizing surface chemistry to modify the porous semiconductor films, 2) linking covalently [Di-tetrabutylammoniumcis-bis (isothiocyanato) bis (2, 2’-bipyridyl-4, 4’dicarboxy-lato) ruthenium (II), N719] dye on the surface of semiconductor films, and study the charge injection dynamics by ultrafast transient absorption spectroscopy, 3) doping the semiconductor films with micro-sized neodymium oxide (Nd2O3) particles, and (4) incorporating metal nanoparticles through molecular linkers to the semiconductor films. The objectives of this work are to address the limitations of chemical stability existing between TiO2/N719 dye systems, to explore the charge dynamics in TiO2/N719 system for a better understanding of the fundamental mechanisms of DSSCs, and to prepare high efficiency

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