烧结曲线对多晶PERC太阳电池光致衰减效应的影响

针对多晶PERC太阳电池其较大的光衰效应会影响功率输出的问题,研究烧结曲线对多晶PERC太阳电池光致衰减效应的影响.在常规烧结曲线1的基础上通过改变烧结曲线峰值温度位置得到优化烧结曲线2和优化烧结曲线3,然后将双面沉积Al2O3/SiNx叠层钝化膜的寿命片和丝网印刷后的多晶PERC电池分别采用不同烧结曲线热处理,最后将...

INFLUENCE OF SINTERING CURVE ON LIGHT INDUCED DEGRADATION EFFECT OF MULTICRYSTALLINE SILICON PERC SOLAR CELLS

In recent years,multicrystalline silicon PERC(passivated emitter and rear cell)solar cell has been developed rapidly due to its low cost and high efficiency,but its performance decreases seriously after long time illumination and there has been no effective solution in the industry. In order to minimize the phenomenon,the influence of sintering curve on light induced degradation effect of multicrystalline silicon PERC solar cells was studied in this paper. Basied on conventional sintering curve 1,the optimized sintering curve 2 and 3 were designed by changing the position of peak temperature of the sintering curve. Then doubly deposited Al2O3/SiNx lifetime samples and multicrystalline silicon PERC cells were fired by different sintering curves. After that the lifetime samples and solar cells were illuminated at 70 ℃ for 45 h under 800 W/m2 light. The results showed that the lifetime decay rates of the lifetime samples fired by sintering curve 1,curve 2 and curve 3 were 63%,42% and 23%,respectively,and the efficiency decay rates of the multicrystalline silicon PERC solar cells fired by sintering curve 1,curve 2 and curve 3 were 6.46%,3.55% and 2.30%,respectively.Electroluminescence test result of illuminated multicrystalline silicon PERC solar cells depicted the brightness from the sintering curve1 was the smallest,that from the curve 2 is in the middle,and the one from the curve 3 is the largest. The above results demonstrated that the light induced degradation of multicrystalline silicon PERC solar cells could be greatly reduced by adjusting the sintering curve of the furnace,which provided a new approach for suppressing the light induced degradation effect in multicrystalline PERC solar cell.