Effects of Solar Conductive silver paste on Ag-Si interface and Solar cell efficiency

• Main Authors: Hsing-chih Huang, 黃信植
• Other Authors: Shun-Tian Lin
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/4r5q6n

碩士 === 國立臺灣科技大學 === 機械工程系 === 100 === In order to improve the efficiency of solar cells, the positive electrode of improvement has been the focus of the study. How to reduce the electrode resistance effectively, without affecting its structural strength. Interface micro-structure between the eleode and the silicon wafer, and recrystallization of silver can gives some result. In this study, change temperature, types of additives, the proportion of metal powder and glass powder proportion than observed the micro-structure. Than mix the best proportion of conductive silver paste. Finally, test of the electrical properties by IV-tester. Observation SEM of the micro-structural, the experimental results show that the rises of temperature, the surface electrodes sintered density and silver - silicon interface recrystallization silver size will follow the increase, but add to some special additives have the same effect at lower temperatures. Increase of the glass powder, also make the size and number of crystalline silver rise, but when the ratio is too high, the hole will increase on the electrode surface than structural strength turns into low , and it makes Isc (short-circuit current) decline, reduce cell efficiency directly. Discuss the results of previous experiments that reduce the glass powder content, increasing the fill rate of metal powders, and select the best additives, sintering temperature than work the IV test. Next step adjust the back electrode aluminum plastic types and the parameters of the sintering equipment. After preliminary optimization, we got the cell efficiency of 17.14%, but the cost of the silver paste only about commercial products 75-80%