Optical absorption edge versus free electron density for the ZnSnN2 films. The calculated dependence of absorption on free electron density is also shown for the two extreme cases of cation ordered (blue dashed line) and fully cation disordered (red solid line) ZnSnN2. The calculations are performed using k·P band structures fitted to the DFT results close to the Γ point. The square points correspond to samples grown under less metal-rich conditions and triangular points to those grown under more metal-rich conditions.
University of Liverpool has demonstrated a new semiconductor material made from abundant elements which can be “tuned” for use in solar cells instead of rare elements...
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