Investigation of Electric Properties Degradation of Multi-crystalline Silicon Solar Cells

摘要

Efficiency degradation of crystalline silicon solar cells is known as a general phenomena in the photovoltaic (PV) applications. Degradation sometimes could be significant to result in failure of PV systems. It is presented in this work that electrical properties of multi-crystalline silicon solar cells(multi cells) degrade under different ambiences, temperatures, humidities and illumination conditions etc. Periodical measurements were taken to demonstrate such trends in detail using various wafer materials. Degradation mechanisims are also discussed in this work, combined with the valid methods to reduce the degradation of multi cells based on current raw materials, equipments and processing technologies.