低成本多晶硅太阳电池光致衰减的研究

Light-induced degradation of low-cost polycrystalline silicon solar cells

研究了多晶硅太阳电池的光致衰减现象,电池所用材料为国产的物理冶金法提纯的低成本多晶硅.实验发现,国产的低成本多晶硅材料制备的太阳电池在光照初期有一定的震荡式衰减,但衰减幅度小于10%,当经过长时间9 h的光照后,效率衰减变得不明显.初步认为造成此现象的可能机理是BOi缺陷对和FeiBs对分解-复合模型两种机制共同起作用,但以FeiBs对的分解-复合为主要机制.

Light-induced degradation phenomenon of polycrystalline silicon solar cells is studied in this paper,which is made from low-cost materials refined by domestic physical metallurgical process.The study found that certiain shaking degradation of the efficiency was observed in early stage of illumination.But the degradation amplitude is less than 10%.After nine hours illumination,little degradation is observed.Such phenomenon may mainly come from the BOi pairs and FeiBs pairs,and the two kinds of mechanism of dissociation-recombination model play together.But the FeiBs pairs＇ is the main mechanism.