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Spectral room temperature photoluminescence (pl) of polycrystalline Cu(In,Ga)Se 2 films (CIGSe) is evaluated with respect to optoelectronic properties and in particular for the determination of the splitting of quasi-Fermi levels (E Fn −E Fp ). For lateral resolution of ≤1 µm a confocal pl-setup is used. The depth profile of the excess carrier densities determining the rates...
Polycrystalline chalcopyrite semiconductors like Cu(In,Ga)(Se 2 ,S 2 ) as physically and technologically promising thin film solar cell absorbers show a considerable degree of spatial inhomogeneity of structural, optical and optoelectronic properties above and below the length scale of grain sizes. The dilution of magnitudes such as splitting of quasi-Fermi levels with a certain distribution...
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