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- W2069853869 abstract "Ultrafast carrier dynamics in Cu(In,Ga)Se₂ films are investigated using femtosecond pump-probe spectroscopy. Samples prepared by direct sputtering and co-evaporation processes, which exhibited remarkably different crystalline structures and free carrier densities, were found to result in substantially different carrier relaxation and recombination mechanisms. For the sputtered CIGS films, electron-electron scattering and Auger recombination was observed, whereas for the co-evaporated CIGS films, bandgap renormalization accompanied by band filling effect and hot phonon relaxation was observed. The lifetime of defect-related recombination in the co-evaporated CIGS films is much longer than that in the direct-sputtered CIGS films, reflecting a better quality with higher energy conversion efficiency of the former." @default.
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- W2069853869 date "2012-05-21" @default.
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- W2069853869 title "Ultrafast carrier dynamics in Cu(In,Ga)Se_2 thin films probed by femtosecond pump-probe spectroscopy" @default.
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- W2069853869 doi "https://doi.org/10.1364/oe.20.012675" @default.
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