Compared with industrial thick crystalline silicon (c-Si) solar cells, thin c-Si cells have unique advantages of greater cost effectiveness and cell flexibility, representing a future technology trend. However, its present efficiency is far behind that of conventional thick c-Si solar cells. To improve the efficiency, it is necessary to consider and implement advanced designs. We report a strategy of optimizing cell designs to significantly improve the efficiency of a 20 μm-thick thin c-Si solar cell. Compared with the reference, the short-circuit current density is increased from 34.3 to 38.2 mA / cm2, the open circuit voltage is boosted from 632 to 684 mV, and the fill factor presents an improvement from 76.2% to 80.8%, resulting in an absolute efficiency gain of 4.6% from 16.5% to 21.1%. The experimental results are further explained by the device simulations.

中文翻译：

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薄晶硅太阳能电池显着效率提升的研究

与工业厚晶硅（c-Si）太阳能电池相比，薄晶硅电池具有更高的成本效益和电池灵活性的独特优势，代表了未来的技术趋势。然而，其目前的效率远远落后于传统的厚晶硅太阳能电池。为了提高效率，需要考虑并实施先进的设计。我们报告了一种优化电池设计的策略，以显着提高 20 μm 厚的薄 c-Si 太阳能电池的效率。与参考相比，短路电流密度从34.3 mA/cm2提高到38.2 mA/cm2，开路电压从632 mV提升到684 mV，填充因子从76.2%提高到80.8%，从而实现了绝对效率提高了 4.6%，从 16.5% 增至 21.1%。