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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Quantitative analysis of the contribution of nanocone gratings to the efficiency of crystalline Si thin-film solar cells
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Quantitative analysis of the contribution of nanocone gratings to the efficiency of crystalline Si thin-film solar cells

机译：纳米锥光栅对晶体硅薄膜太阳能电池效率的贡献的定量分析

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摘要

Quantitative analysis of the contribution from different physics mechanisms induced by nanocone gratings (NCG) to the efficiency of crystalline Si thin-film solar cells is systematically demonstrated through the performance comparison of such a nanotextured Si solar cell, an equivalent reflection planar Si solar cell, an equivalent volume planar Si solar cell and an actually planar Si solar cell, when their back-interface is a perfect-matched layer or air and their thickness is 1m or 10m. The results indicate that the contribution of each physics mechanism to the ultimate efficiency and their total contribution are significantly influenced by the thickness of their active layer. When the height of the NCG structure is comparable to the thickness of the active layer, the contribution from each physics mechanism to the efficiency must be considered. In that respect, the contribution from the guided-mode resonance effect is the largest, and even surpasses the contribution of the active layer itself. When the active layer is significantly thicker than the height of the NCG structure, the contribution from antireflection induced by such a nanostructure rises up to the most, and the volume reduction effect can be ignored. In addition, the cavity-resonance effect exhibits a weak contribution and seems to be insensitive to the active layer thickness and interface reflection. Such an investigation provides a methodology to optimize nanostructure-textured thin-film solar cells. Furthermore, the comparison of efficiency between a 1 m thick NCG-textured solar cell and a 10m thick planar solar cell indicates that higher efficiency can be achieved in a thinner Si solar cell by the use of the optimized NCG structure, which just fulfils the expectation of third generation of Si solar cells.
机译：通过这种纳米结构化的硅太阳能电池（等效反射平面硅太阳能电池）的性能比较，系统地证明了纳米锥光栅（NCG）诱导的不同物理机制对晶体硅薄膜太阳能电池效率的贡献的定量分析，等效平面硅太阳能电池和实际平面硅太阳能电池，当它们的背界面为完美匹配的层或空气且厚度为1m或10m时。结果表明，每种物理机制对最终效率的贡献及其总贡献受其活性层厚度的影响很大。当NCG结构的高度与有源层的厚度相当时，必须考虑每种物理机制对效率的贡献。在这方面，引导模式共振效应的贡献最大，甚至超过了有源层本身的贡献。当活性层明显厚于NCG结构的高度时，由这种纳米结构引起的抗反射的贡献最大，并且体积减小效果可忽略不计。另外，腔共振效应表现出微弱的作用，并且似乎对有源层的厚度和界面反射不敏感。这样的研究提供了优化纳米结构织构的薄膜太阳能电池的方法。此外，通过比较1m厚的NCG纹理太阳能电池和10m厚的平面太阳能电池的效率，可以看出，通过使用优化的NCG结构，可以在更薄的Si太阳能电池中实现更高的效率，这完全符合预期第三代硅太阳能电池。

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