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Splitting of the quasi-Fermi levels as a function of time for polycrystalline samples with = 0.95 (green) and = 1.05 (orange). Solid lines: measurements on bare absorbers after the etch in ; dashed lines: measurements after the deposition. The rectangles () correspond to the state before etching.
The decay constant (left axis; circles) and the prefactor A (right axis; squares) of the exponential decay function as a function of the ratio for polycrystalline absorbers. The dashed lines act as a visual guide.
Splitting of the quasi-Fermi levels as a function of time between etching and the deposition of (black circles) and the aged state before any treatment (red squares). t = 0 represents the deposition of . The negative time is the time difference between the etch and the deposition.
Splitting of the quasi-Fermi levels as a function of time for polycrystalline samples immediately after the growth (dashed lines) and after etching in KCN after two months in ambient air (solid lines).
Summary of the decrease of the quasi-Fermi level splitting for polycrystalline (poly) and epitaxial (epi) samples with and .
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