Impact of alkali doping on carrier transport in Cu2 ZnSn(S, Se)4 thin films for solar cell applications
2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC)(2016)
摘要
The effects of alkali doping (Na, Li, K) on the carrier transport in Cu
2
ZnSn(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.
更多查看译文
关键词
photocarriers,doping,time-resolved THz spectroscopy,solar cell,thin films,alkali doping,Cu2ZnSn(SSe)4
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络