Abstract
The codoped dilute magnetic semiconductor CuIn0.9CexCo0.1−xTe2 has been successfully prepared by arc melting and vacuum solid-state reaction technologies. CuIn0.9CexCo0.1−xTe2 crystallizes into body centered tetragonal structure with a space group of I4¯2d. The codoping of Co and Ce induces the room temperature ferromagnetism in CuIn0.9CexCo0.1−xTe2. The magnetization of CuIn0.9CexCo0.1−xTe2 are enhanced by codoping Ce and Co into CuInTe2, which is ascribed to the exchanging interaction between 4f electron of Ce and 3d electron of Co. Magnetic measurements show that Co influences mainly on the saturation magnetic moment of CuIn0.9CexCo0.1−xTe2. The high doping ratio of Co and Ce is beneficial for increasing saturation magnetization and the magnetic transformation temperature. Codoping Ce and Co into CuInTe2 can adjust the light absorption bandgap from 0.92 eV to 1.08 eV, which is slightly higher than that of CuInTe2. It shows that the light absorption bandgap can be refined by controlling Co/Ce ratio for the potential application of solar cell material.
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