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On the Application of Lifetime-Equivalent Defect Densities on Solar Cell Level

On the Application of Lifetime-Equivalent Defect Densities on Solar Cell Level

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HERGUTH, Axel, 2021. On the Application of Lifetime-Equivalent Defect Densities on Solar Cell Level. In: IEEE Journal of Photovoltaics. IEEE. 11(6), pp. 1410-1418. ISSN 2156-3381. eISSN 2156-3403. Available under: doi: 10.1109/JPHOTOV.2021.3110337

@article{Herguth2021Appli-55447, title={On the Application of Lifetime-Equivalent Defect Densities on Solar Cell Level}, year={2021}, doi={10.1109/JPHOTOV.2021.3110337}, number={6}, volume={11}, issn={2156-3381}, journal={IEEE Journal of Photovoltaics}, pages={1410--1418}, author={Herguth, Axel} }

The concept of lifetime-equivalent defect density based on lifetime measurements as a measure of electrically active defect density is extended to solar cells using Suns-V<sub>oc</sub> measurements. It is found to be superior to previous approaches, and offers defect-specific injection-dependent information. However, the correct application of the presented method requires some knowledge of or reasonable assumptions on sample properties and measurement conditions, in particular, effective intrinsic carrier concentration, doping level, and measurement temperature. Furthermore, it is found that samples with high effective excess carrier lifetime can be susceptible to nonequilibrium related issues when the measurement duration is too short compared with lifetime. The use of series-resistance affected current-voltage curves is found to be error-prone. 2021-11-05T10:01:30Z 2021 Herguth, Axel 2021-11-05T10:01:30Z Herguth, Axel eng On the Application of Lifetime-Equivalent Defect Densities on Solar Cell Level

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