低成本多晶硅太阳电池性能的模拟

SIMULATION OF PERFORMANCE OF LOW-COST POLYSILICON SOLAR CELLS

提出低成本太阳能级多晶硅太阳电池的一维模型,多晶硅材料是由物理冶金法提纯的。在接近实际的条件下,计算了晶粒大小和晶界复合速率对电池光电转换效率的影响。模拟结果与实验数据基本吻合。实验和模拟结果表明要使电池性能达到最佳,晶粒尺寸需大于5mm;晶界复合速率足够低的情况下,对晶粒尺寸的要求可降低。

A one-dimensional model for solar cells fabricated on low-cost solar grade polysilicon （SoG poly-Si ） material was presented which was produed by physical metallurgical process. The effect of grain size and grain boundary recombination velocity on the photoelectric conversion efficiency were calculated under almost practical case. The simulation results coincided with the experimental data. It is found that in order to attain the best performance of low-cost SoG-Si solar ceils, grain sizes greater than 5mm will be needed. It is also found that a small grain size is permitted if the effective grain boundary recombination velocity is low enough.