期刊
APPLIED PHYSICS LETTERS
卷 105, 期 3, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4890844
关键词
-
资金
- U.S. Department of Energy, Energy Efficiency and Renewable Energy Program [DE-EE0006334]
We present a device model for the hydrazine processed kesterite Cu2ZnSn(S,Se)(4) (CZTSSe) solar cell with a world record efficiency of similar to 12.6%. Detailed comparison of the simulation results, performed using wxAMPS software, to the measured device parameters shows that our model captures the vast majority of experimental observations, including V-OC, J(SC), FF, and efficiency under normal operating conditions, and temperature vs. V-OC, sun intensity vs. V-OC, and quantum efficiency. Moreover, our model is consistent with material properties derived from various techniques. Interestingly, this model does not have any interface defects/states, suggesting that all the experimentally observed features can be accounted for by the bulk properties of CZTSSe. An electrical (mobility) gap that is smaller than the optical gap is critical to fit the V-OC data. These findings point to the importance of tail states in CZTSSe solar cells. (C) 2014 AIP Publishing LLC.
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