DEFECT CHEMISTRY OF CUINSE2

The defect chemistry model is developed as a function of the nonmolecularity (DELTAX) and nonstoichiometry (DELTAY), and the formation energies of defects are also considered. In this model, the p-type conductivity can occur in the region with DELTAX < 0 and DELTAY < 0 and n-type conductivity can occur in the region with DELTAX > 0 and DELTAY > 0. For above given regions, it could be possible to define a critical relation as DELTAX(c) = 8DELTAY/(I - 2DELTAY). The p-type conductivity occurs in the DELTAX (more negative value) < DELTAX(c) region at a constant DELTAY value. As the decreasing of DELTA X negative value, the type conversion appears near the DELTAX equals to DELTAX(c) region, and then it was dominated by n-type conductivity.