The diffusion of Li and Al, from the vapour phase, into Cl-doped CdTe was studied at temperatures ranging from 570 to 700K. The concentration profiles were determined by measuring the Hall constant during layer removal by etching. It was found that the diffusivity of Li could be described by:

D (cm2/s) = 1.62 x 106 exp[-1.98(eV)/kT]

while the diffusivity of Al could be described by:

D (cm2/s) = 6.76 x 101 exp[-1.43(eV)/kT]

However, the results were sensitive to the reactivity of the surface and, in the case of Li diffusion, there were 2 diffusion components.

G.S.Pavlova, E.L.Kanunova, J.M.Ivanov: Izvestiya Akademii Nauk SSSR - Neorganicheskie Materialy, 1991, 27[2], 263-6. (Inorganic Materials, 1991, 27[2], 190-3)

Table 5

Diffusivity of Ag, Cu and Li in CdTe

Figure 5

Diffusivity of Au in CdTe