【摘要】 表面凹坑阵列结构具有良好的陷光特性,能有效地降低电池表面的光能反射和延长光在电池吸收层中的光程,因此在光伏领域,特别是在硅薄膜太阳能电池中具有良好的应用前景.本文采用理论分析与实验验证相结合的方法,对凹坑阵列陷光结构的光学衍射特征进行研究,并讨论了凹坑阵列结构的衍射效应对硅薄膜太阳能电池吸收特性的影响.研究结果发现,凹坑阵列陷光结构的深宽比越大,其衍射效率越好,越有利于光的均匀散射,越有利于电池对入射光的吸收和电池效率的提升.另外,凹坑阵列结构的衍射特性还与入射波的波长有关,入射波长越长,其衍射效果越好.本研究对于高效表面陷光阵列的设计以及高效衍射效率光栅的制备具有重要的参考价值.更多还原

【Abstract】 Pit array structure has a good light-trapping characteristic, which can effectively reduce the surface light reflection and prolong the optical path. Therefore in the photo voltaic field, especially in the thin film silicon solar cells field, the pit array structure has good prospects. In this paper, a combining method of theory analysis and experimental verification was used to research the optical diffraction characterizes of the surface pit array light-trapping structure, and the effect of diffraction on the absorption characteristics of silicon thin-film solar cells was discussed. The results show that the greater the aspect ratio of the pit arrays, the better effect of the diffraction, which is more advantageous for uniform scattering of light, and more contribution to the absorption of the incident light and the improvement of the efficiency for the solar cells. Another, the diffraction characteristics of the pit structure are also related to the wavelength of the incident wave. The longer the incident wavelength is, the better the diffraction effect is. This paper research is of important reference value for the design of high-efficiency light-trapping arrays and diffraction grating.更多还原