Abstract
The formation of vanadium-related defects and defect complexes in CdTe codoped with Zn and V has been studied using electron paramagnetic resonance (EPR). Whereas in Zn-free crystals only the defect and in 5% and 10% Zn-alloyed ZnCdTe only a complex were previously observed by EPR, both defects are observed simultaneously under thermal equilibrium conditions in low-concentration Zn- and V-codoped samples. As a SIMS impurity analysis does not show contamination at the level, the model of second nearest neighbour complexes seems to be appropriate. The concentration of the defects is much higher than expected from a statistical distribution of Zn and V.
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