The efficiency of solar cells can be enhanced by increasing the light intensity and/or the number of bandgaps of the structure. However, current solar cells cannot fully exploit these two factors because of various critical drawbacks. Here, we show a novel microscale, that is, side ≈ 0.5 mm, vertical solar cell structure that does not suffer the series resistance and bandgap limitations issues of current devices. The preliminary structures investigated show extreme efficiencies, >40%, at ultrahigh concentration factors of 15 000 suns. In addition, future designs with a better bandgap configuration are expected to deliver cells with efficiencies far above 50% at extreme light intensities. This early design offers a fast and reliable route to push the efficiency towards the maximum solar conversion limit and represents a promising way to develop new‐generation ultraefficient and low‐cost concentrator photovoltaic systems.

中文翻译：

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适用于下一代聚光太阳能电池的超高效本征垂直隧道结结构

可以通过增加结构的光强度和/或带隙的数量来提高太阳能电池的效率。然而，由于各种严重的缺陷，当前的太阳能电池不能充分利用这两个因素。在这里，我们展示了一个新的微型，那就是，侧≈0.5毫米的垂直太阳能电池结构，不会受到当前器件的串联电阻和带隙限制的困扰。研究的初步结构显示，在15,000个太阳的超高聚光系数下，极端效率> 40％。此外，未来的具有更好带隙配置的设计有望在极端光强度下提供效率远远超过50％的电池。这种早期的设计提供了一种快速而可靠的途径，可以将效率提高到最大的太阳能转换极限，并且是开发新一代超高效，低成本聚光光伏系统的有前途的方式。