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In this work we examine the effectiveness of hydrogen passivation at grain boundaries as a function of defect type and microstructure in multicrystalline silicon. We analyze a specially prepared solar cell with alternating mm-wide bare and SiNx-coated stripes using laser beam-induced current (LBIC), electron backscatter diffraction (EBSD), synchrotron-based X-ray fluorescence microscopy (μ-XRF), and...
In this work a method for the quantitative and spatially resolved detection of dissolved chromium is presented. For the quantitative evaluation of the Cri concentration the defect parameters (capture cross sections and energy levels) for Cri and CrB from literature are reviewed and compared to measurements. The method is applied to mono- and multicrystalline samples with different doping and Cr contamination...
This paper focuses on the influence of the effective intra-grain minority charge carrier diffusion length and surface recombination velocity at grain boundaries on solar cell parameters. Both can be extracted in principle from Light- and Electron Beam Induced Current measurements (LBIC and EBIC). Multicrystalline floatzone (mc FZ) silicon with different grain sizes was processed to solar cells with...
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