激光与光电子学进展, 2016, 53 (6): 060402, 网络出版: 2016-06-06  

超薄晶硅太阳电池的吸收损耗

Absorption Losses of Ultrathin Crystalline Silicon Solar Cells
作者单位
渤海大学新能源学院, 辽宁 锦州 121013
摘要
利用频域有限差分法,分析了两种典型晶硅电池结构的Ag背反镜的吸收损耗。研究表明:平板型晶硅电池Ag背反镜的损耗主要是由本征吸收和导模共振吸收引起,而表面等离子体共振吸收使TM模的吸收峰峰值大于TE模的吸收峰峰值;织构型的晶硅电池内部光场分布复杂,可在光垂直入射情况下,使TE模和TM模均在有源层中出现较强的导模共振效应,且TM模还可在Ag背反镜中激励起等离子体共振效应,从而使织构型晶硅电池Ag背反镜的吸收谱表现为多峰值特性,且其吸收峰峰值大于平板型晶硅电池的吸收峰峰值。
Abstract
The absorption losses of the Ag back reflector in two typical silicon solar cells have been analyzed by frequency domain finite difference method. The results show that, in flat silicon solar cell, the losses of Ag back reflector are mainly caused by intrinsic absorption and the oscillation absorption of guided modes. The absorption peaks of TM modes caused by surface plasma oscillation are larger than those of TE modes. In the textured crystalline silicon cell, the distribution of light are complex, and strong guided modes oscillation in the active layer can be introduced by normally incident light of both TE and TM modes. Strong surface plasma oscillation in Ag back reflector can be produced by TM modes. Therefore, in the textured crystalline silicon cell, the absorption spectra show multi-peak characteristics and the values of absorption peaks are larger than those in the flat type crystalline silicon cell.

陆晓东, 张鹏, 赵洋, 王泽来, 吴元庆, 张宇峰, 周涛. 超薄晶硅太阳电池的吸收损耗[J]. 激光与光电子学进展, 2016, 53(6): 060402. Lu Xiaodong, Zhang Peng, Zhao Yang, Wang Zelai, Wu Yuanqing, Zhang Yufeng, Zhou Tao. Absorption Losses of Ultrathin Crystalline Silicon Solar Cells[J]. Laser & Optoelectronics Progress, 2016, 53(6): 060402.

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