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Spatially resolved electrical modelling of cracks and other inhomogeneities in crystalline silicon solar cells
Progress in Photovoltaics ( IF 6.7 ) Pub Date : 2020-09-29 , DOI: 10.1002/pip.3348
Miha Kikelj 1 , Benjamin Lipovšek 1 , Matevž Bokalič 1 , Marko Topič 1
Affiliation  

We developed a fully scalable quasi‐SPICE approach for electrical modelling of stress‐induced inhomogeneities in crystalline silicon solar cells, based on damage detected by electroluminescence imaging. We present a model of active and inactive microcracks, highlight their effects on the current‐voltage characteristic, and validate the model on a number of experimental cases. The generalisation of our model to a complexly damaged solar cell shows excellent agreement with the measurements, with only 0.12% estimation error of the power loss of the complexly damaged cell. The ability to accurately model fundamental stress induced inhomogeneities, and their effects on cell level is crucial to estimating long‐term performance degradation and energy yield of installed photovoltaic modules throughout their lifetime. The developed scalable model paves a path to intricate, statistically supported modelling for power loss prediction and mitigation in solar cells, photovoltaic modules, and photovoltaic arrays caused by mechanically induced inhomogeneities.

中文翻译:

晶体硅太阳能电池中裂纹和其他不均匀性的空间分辨电模型

我们基于电致发光成像检测到的损伤,开发了一种完全可扩展的准SPICE方法,用于对晶体硅太阳能电池中应力引起的不均匀性进行电建模。我们提出了一个主动和非主动微裂纹模型,重点介绍了它们对电流-电压特性的影响,并在许多实验案例中对该模型进行了验证。我们的模型对复杂损坏的太阳能电池的一般化与测量结果显示出极佳的一致性,复杂损坏的电池的功率损耗估计误差仅为0.12%。准确建模基本应力引起的不均匀性及其对电池单元水平的影响的能力对于估算已安装的光伏模块在其整个寿命期间的长期性能下降和能量产出至关重要。
更新日期:2020-09-29
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