태양전지 전면전극용 실버 잉크에서 실버 네오테카노에이트가 접촉 비저항에 미치는 영향성

Abstract

Since the issues such as depletion of fossil fuel, environmental pollution, and dangerousness of nuclear energy are currently magnified around the world, people shed new light on new renewable energy. Among various new renewable energy, it is a solar cell using solar light that has most often been studied and has been put to practical use. Solar cell is now being provided for industrial and family use and is worldwidely getting the limelight as a substitute for nuclear energy. Electric power from solar cell is produced through a method that convert solar light into electric energy and the maximization of solar cell efficiency might be the biggest issue. In addition to overseas companies, local manufacturers and researchers are making large investments in maximization of solar cell efficiency. Among a number of factors that impede the efficiency of solar cell, front electrodes formulated in front of silicon and contact resistivity between layers of silicon emitter are one of the main reasons. In this study the selection of general materials for making silver ink for formulating front electrodes of solar cell and the influence of addition of silver neodecanoate, a kind of organic silver, on contact resistivity and efficiency were investigated. The ratio of solvent was determined by selecting BCA and terpineol through the cosolvent system and the kind and content of silver and glass frit were decided with inorganic solid content. Also, contact resistivity between electrode and wafer according to existence of organic silver was observed. It was found that the windows of firing temperature process broadened more with the addition of organic silver than those without organic silver addition, which seems to have contributed to the improvement of contact resistivity and the increase of efficiency through the increase of contact area on the interface of electrode and wafer and the increase of colloidal density inside glass frit layer.