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| Home > Publications database > Three-Dimensional and Multimodal X-Ray Microscopy Reveals the Impact of Voids in CIGS Solar Cells |
| Home > Publications database > Three-Dimensional and Multimodal X-Ray Microscopy Reveals the Impact of Voids in CIGS Solar Cells |
| Abstract | PUBDB-2025-02281 |
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2023
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Please use a persistent id in citations: doi:10.1109/PVSC48320.2023.10359840
Abstract: The formation of small voids in polycrystalline absorbers has been repeatedly reported, whether after device fabrication ordegradation. Although it certainly increases risk of delamination and complicates deposition of additional top layers and cells, itis not clear whether or how detrimental it is for photovoltaic performance. In our study, using synchrotron imaging, wenon-destructively probe local performance deficits attributable to voids and highlight the complex 3D nature of structuraldefects in high-efficiency thin-film CIGS solar cells. We find that, although possibly detrimental at a local level, voids only have aminor effect at the device level, given the abundance of voids and the high efficiency of the cell. Our quantification of theabsolute electron densities at the nanoscale may enable the development of adequate comprehensive models simulatingstructural and electronic defects. In the full presentation, we will show high-resolution images and 3D renderings ofnanostructures in CIGS and put them in the context of spatially resolved performance measurements. Furthermore, we willshowcase recent developments in X-ray imaging and give an outlook to technical developments at new X-ray sources that willbecome available in the coming years and enable a further increase of sensitivity and spatial resolution.
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