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Temperature dependent time resolved photoluminescence (TR-PL) measurements have been performed in similar structured kesterite Cu2ZnSn(S,Se)4 and chalcopyrite Cu(In,Ga)Se2 thin film absorbers. It is investigated that at 26 K the measured lifetime values for a set of CZTSSe samples are more than one order magnitude higher than at room temperature whereas in CIGS this difference is not significant....
Room-temperature two-wavelength excited photoluminescence (PL) measurements have been performed in the kesterite Cu2ZnSnS4(CZTS) and Cu2ZnSn(S,Se)4 (CZTSSe) thin film absorbers. A defect level at 0.8 eV from the valence band and its properties are investigated. Two light sources of 635 nm and 1550 nm diode lasers, respectively, were used for above bandgap and 0.8 eV defect level excitation. The two-wavelength...
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