کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5450088 | 1512855 | 2017 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Bulk and interface recombination in planar lead halide perovskite solar cells: A Drift-Diffusion study Bulk and interface recombination in planar lead halide perovskite solar cells: A Drift-Diffusion study](/preview/png/5450088.png)
- Drift-Diffusion equations are used to study planar perovskite solar cells.
- Obtained defect densities are in good agreement with experiments.
- Shockley-Queisser limit for the ideal Perovskite solar cell is presented.
- Bulk and interface defects are presented as loss factors in the ideal device.
- We identify the interface defects as the major loss factor in perovskites.
A theoretical approach based on Drift-Diffusion equations is presented to study planar mixed lead halide perovskite solar cells. Updated physical parameters such as permittivity, mobility, effective density of states and doping density is employed in simulations. Current-voltage curve data for two experimental sample is imported and through fitting with the model, density of bulk and interface defects is calculated. We obtain the bulk defect density around 1016Â cmâ3 and surface recombination velocities in the range of 10Â cm/s. These values which are in good agreement with experimental measurements and considerably deviated from previous theoretical studies, verify the model and adopted constants. Shockley-Queisser limit is also presented as the ideal device and the effect of bulk and interface defects are presented as loss factors that cause departure from this limit. Our simulations conclude that the overall efficiency of perovskite solar cells is mainly governed by the open-circuit voltage and also identify the interface defects as the major loss factor in these devices.
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Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 94, October 2017, Pages 118-122