薄膜太阳能电池及制造工艺_图文.ppt

* * MG: Our core technology is based on polycrystalline material, Copper Indium Gallium Diselenide. We call it CIGS. This material has the highest light absorption of thin film technologies, which means less material, about 50x less, and therefore lower cost. Due to the inherent lower costs of materials and processing, CIGS is very competitive to silicon. Earlier the moderator put up a chart that showed efficiency as a drawback for thin films. We’re looking towards large increases in efficiency and economies of scale, and cost reductions, compared to mature silicon technologies which have about 20 years in the market today. Our efficiencies are about 75% of single and polysilicon technologies today, and still increasing. We expect that since our material and product cost are lower, and our prices are becoming more competitive, and we expect to see an increase in efficiency, CIGSs should become very compelling in the market. We can put it on three different substrates, either glass, stainless steel or various polymers. Our choice to date has been to put it on flexible stainless steel, although we’re working in the labs to put it on polymers. * * * * * * * * * CIGS太陽能電池元件結構 利用直流濺鍍或者電子束蒸鍍的方式沈積一層鉬(Mo)當作背電極，接正極。 鉬金屬與CIGS薄膜具有良好之歐姆接觸特性，此外鉬金屬薄膜具有高度的光反射性、低電阻。 Glass / Stainless Steel / Polymer Mo (0.5~1.5μm) CIGS太陽能電池元件結構 吸收層CIGS 本身具黃銅礦结构(Chalaopyrite)，可以由化學組成的調變直接得到P-type 或者是N-type 。 Vacuum method (1) 共蒸鍍(Co-evaporation) (2) 濺鍍(Sputtering ) Non-Vacuum method (1) 電鍍(Electrodeposition) (2) 涂布制程(Coating Process) Glass / Stainless Steel / Polymer CIGS (1.5~2μm) Mo (0.5~1.5μm) CIGS Modules are Fabricated On: I. Soda lime glass as the substrate; cells are monolithically integrated using laser/mechanical scribing. Monolithic integration of TF solar cells can lead to significant manufacturing cost reduction; e.g., fewer processing steps, easier automation, lower consumption of materials. CIGS Modules are Fabricated On: (cont.) The number of steps neede