| The energy crisis and enviromental pollution promoted the clean energy’s extensiveresearch and application development. Solar photovoltaic power generation is a new technology,by using of photovoltaic effects, the sunlight radiant energy can convert to electrical energydirectly. There are various kinds of solar cell, which can be roughly divided into crystallinesilicon cells and thin-film solar cells. With the achievements of application research anddevelopment and the international popularisation of various policy, the crystalline silicon solarcells have already entered a practical stage. Moreover, since the commercial thin-film solar cellsbegan to enter the market around1980s, the performance of crystalline silicon cells haveobtained particularly remarkable progress, and the photoelectric conversion efficiency ofcrystalline silicon cells still has further improve potential.In order to obtain high energy photoelectric conversion efficiency, reduce production costs,in recent years people have made much studying on it. It is an effective way to apply the anti-reflection layer to improve efficiency. That’s one of the method is to have a coating on the solarcells, another way is to make the surface to high-density pyramid or the structure of thetetrahedron structural surface, that is texture. The special surface can increase wafer surface ofthe sun radiation absorption,on the surface, minimize the surface reflection losses of sunlighteffectively, realize the high probability use to catching the light, thus is becoming a low costcrystalline silicon surface morphology of the method of preparation.In the first chapter,we illustrate the basic theory of solar cells, summarize the currentresearh situation of crystalline silicon solar cells at home and abroad. We also briefly explain thecrystalline silicon solar cell production process, and the comparison among various kinds oftexturization preparation reported are described. Finally we illustrate the significance and themain research of this paper. Chapter2detailes the texturization technique for monocrystalline silicon solar cells, byusing of two kinds of corrosion solutions. We briefly illustrate the chemical reaction principlesand the texturization process of monocrystalline silicon solar cells. The homogeneous and smallpyramids in the textured structure of silicon crystalline is obtained by placing the solutions inseal environment, by using Na2CO3/NaHCO3solution, NH3·H2O solution as an escharotics,respectively. Finally, the morphology of corroded monocrystalline silicon chips have beenobserved by scanning electron microscope, and the surface reflectivity performance testing havebeen taken with uv-vis spectrophotometer.In the third chapter of this paper, based on the obtained results, the effects of eachcomponent content, etching time, temperature in the solution on the surface texturisation ofsilicon were investigated. Moreover, we conclude the best experimental parameters, that includesthe concentration of solutions, texturing time and reaction temperature.At last, we summarize the technique’s advantages, analyze the existing problems, proposeits corresponding solutions. |
