大面积背接触背结太阳能电池,效率超过21%

G. Galbiati, V. Mihailetchi, A. Halm, L. J. Koduvelikulathu, R. Roescu, R. Kopecek, K. Peter, J. Libal
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引用次数: 3

摘要

在这项工作中,高效率的太阳能电池是用低成本的工业技术制造的。太阳能电池概念被称为ZEBRA:一种无晶片工艺,其中标准156×156 mm2单晶n型Cz-Si被加工成高效率的Interdigitated Back Contact (IBC)太阳能电池。在我们的第一次试验中,我们在239平方厘米的太阳能电池上获得了超过20%的转换效率。通过对该装置的三维模拟,进一步提高了21.5%以上。我们确定了开路电压和串联电阻作为主要损耗来实现模拟效率。经过广泛的优化,主要针对填充因子的改善,在本工作中提出了细胞结果。优化后的太阳能电池的能量转换效率提高了21%。此外,为ZEBRA电池设计的简单金属化和模块互连允许双面应用。室内和室外对单电池模块的测量表明,在一个太阳正面照明条件下,产生的功率提高了12%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Large area back-contact back-junction solar cells with efficiency exceeding 21%
In this work high efficiency solar cells are fabricated with the use of low-cost industrially available technologies. The solar cell concept is called ZEBRA: a litho-free process in which standard 156×156 mm2 monocrystalline n-type Cz-Si are processed into high efficiency Interdigitated Back Contact (IBC) solar cells. In our first trial we obtained conversion efficiencies of more than 20% on solar cells with 239 cm2 area. With the help of a three-dimensional simulation of the device, a further improvement to more than 21.5% was demonstrated. We indentify the open-circuit voltage and the series resistance as the main losses to achieve the simulated efficiency. After an extensive optimization, targeting mainly the improvement of the fill factor, the cell results are presented in this work. The optimised solar cells show an improvement in the energy conversion efficiency of up to 21%. Furthermore, the simple metallization and the module interconnection designed for the ZEBRA cells allow for a bifacial application. Indoor and outdoor measurements on single-cell modules show an enhancement in the generated power of up to 12% at one sun front illumination conditions.
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