STRIPE STRUCTURE CDTE-CDZNTE-CDTE IN A BULK SINGLE-CRYSTAL

In this paper we present a study that was aimed at performing a select ive diffusion of Zn into CdTe. A single crystal CdTe wafer was fabrica ted into a ''tooth-like'' structure which was further subjected to hig h temperature annealing in the presence of Zn vapour. The sample was t hen cut parallel to the diffusion direction and a Zn concentration ana lysis, using an electron microprobe, was performed. As expected, the s tripe structure CdTe-CdZnTe-CdTe has been confirmed. The Zn decay prof iles were fitted to a modified diffusion model, suggesting a bulk diff usion mechanism coupled with a surface reaction. Practical implementat ion of this stripe structure for an infrared light waveguide is being evaluated.