L. Phuong, John K. Katahara, G. Yamashita, Masaya Nagai, Masaaki Ashida, H. W. Hillhouse, Yoshihiko Kanemitsu
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引用次数: 2
Abstract
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 photocarriers, but Li and K doping do not. Consequently, we are able to evaluate the diffusion length of photocarriers as a function of the alkali dopants. This result provides a helpful orientation for future efforts to improve the performance of CZTSSe-based solar cells.
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