Min Yuan, David B. Mitzi, et al.
Thin Solid Films
We present a device model for the hydrazine processed kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cell with a world record efficiency of ∼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 VOC, JSC, FF, and efficiency under normal operating conditions, and temperature vs. VOC, sun intensity vs. VOC, 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 VOC data. These findings point to the importance of tail states in CZTSSe solar cells.
Min Yuan, David B. Mitzi, et al.
Thin Solid Films
Davood Shahrjerdi, Stephen W. Bedell, et al.
Applied Physics Letters
Zhengtao Xu, David B. Mitzi, et al.
Inorganic Chemistry
Oki Gunawan, Babak Fallahazad, et al.
PVSC 2010