Figure 6
XRD patterns of ZnTe layers annealed in (a) vacuum and (b) nitrogen atmospheres. The vacuum-annealed ZnTe layer at more than 250 ℃ gives the presence of Te peaks (red), possibly arising from a phase separation event of the ZnTe layer during vacuum annealing. The presence of phase-separated Te peaks may be highly associated with the electrical degradation observed from the higher annealing temperature over 250 ℃ while the nitrogen-annealed ZnTe layer refers to thermally robust and stable patterns associated with having no phase separation characteristics.
