纳米Ag-Cu粉在多晶硅太阳能电池银浆中的应用

采用稻米中淀粉作为稳定剂,氢氧化钠作为还原剂的方法制备了银铜纳米颗粒。利用扫描电子显微镜在高倍数下观察Ag-Cu纳米颗粒表面形貌;通过透射电镜定性分析了银铜纳米颗粒的空间结构;通过X线光电子能谱分析得到粉末中元素成分及其相对含量;通过热重分析定量地确定了太阳能电池的烧结工艺;通过太阳能模拟器分别对正电极浆料中加入纳米Ag-Cu颗粒(质量分数为10%)前、后的多晶硅电池片进行光电性能测量。结果显示,在银浆中加入了质量分数为10%的纳米Ag-Cu后,电池片的各参数都有提高,其光电转化效率提高了5.65%。实验表明,利用Cu纳米颗粒取代部分Ag纳米颗粒,可提高电池的光电转化效率。

Application of Nano Ag Cu Powders to the Silver Paste of Polysilicon Solar Cells

The silver copper nanoparticles were prepared by using the starch in rice as the stabilizer and the sodium hydroxide as the reducing agent. The surface morphology of silver copper nanoparticles was observed by SEM at high magnification and the structure of the silver copper nanoparticles was qualitatively analyzed by the transmission electron microscopy.The elemental composition and the relative content of each element were determined by X ray photoelectron spectroscopy. The solar cell sintering process was quantitatively determined by thermogravimetric analysis (TGA).The photoelectric performance measurements of the polycrystalline silicon cells with and without addition of 10% Ag Cu nanoparticles to the positive electrode paste were performed respectively by using the solar simulator. The results showed that the addition of 10% nano Ag Cu to the positive electrode paste resulted in the increase of the Ag Cu content,and the cell parameters were improved, among which the most important photoelectric conversion efficiency was increased by 5.65%.This verified that the use of cheaper Cu nanoparticles to replace part of the Ag nanoparticles was able to slightly improve the efficiency of the photoelectric conversion of the battery.