Impact of alkali doping on carrier transport in Cu2ZnSn(S,Se)4 thin films for solar cell applications

The effects of alkali doping (Na, Li, K) on the carrier transport in Cu2ZnSn(S,Se)4 (CZTSSe) thin films have been studied systematically using time-resolved THz spectroscopy. Na and Li doping seem to have no influence on the carrier mobility, whereas K doping leads to a noticeable decrease. In addition, we found that Na doping increases the lifetime of… CONTINUE READING

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