p-a-SiC:H降低晶体硅异质结太阳能电池寄生损失的研究

Study on Reducing Parasitic Loss of Crystalline Silicon Heterojunction Solar Cells by p-a-SiC:H

使用宽带隙的p型氢化非晶硅碳(p-a-SiC:H)薄膜作为晶体硅异质结(SHJ)太阳能电池的窗口层,使用时域有限差分法(FDTD)模拟证明,p-a-SiC:H不仅能明显降低窗口层的短波寄生吸收损失,而且可以减少SHJ太阳能电池的反射损失,从而增强SHJ太阳能电池的光谱响应。实验结果也证明,使用优化的p-a-SiC:H窗口层可以提升SHJ太阳能电池的短路电流(J_(sc))达1.4 mA/cm^(2),电池光电转化效率达到了21.8%。这主要是由于p-a-SiC:H低的寄生吸收以及使用p-a-SiC:H窗口层降低了SHJ太阳能电池的反射损失所致。

The wide-band gap p-type hydrogenated amorphous silicon carbon(p-a-SiC:H)film was used as window layer of silicon heterojunction(SHJ)solar cells.Finite difference time domain(FDTD)simulation results showed that p-a-SiC:H not only significantly reduced the short-wave parasitic absorption loss of the window layer,but also reduced the reflection loss of SHJ solar cells,thereby enhancing the spectral response of SHJ solar cells.Meanwhile,the experimental results showed that the optimized p-a-SiC:H window layer could increase the J_(sc) of SHJ solar cells to 1.4 mA/cm^(2),and achieved a cell efficiency of 21.8%.This improvement is primarily attributed to the low parasitic absorption of the p-a-SiC:H window layer and its ability to reduce reflection losses in SHJ solar cells.