The diffusion of Li from the vapour phase into Cl-doped CdTe was studied at 570 to 700K. The concentration profiles were determined by measuring the Hall constant during layer removal by etching. It was found that the diffusivity could be described by:
D (cm2/s) = 1.62 x 106 exp[-1.98(eV)/kT]
The results were sensitive to the reactivity of the surface, and 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 7
Diffusivity of Mn in CdTe under Cd or Te Saturation
Temperature (C) | Overpressure | D(cm2/s) |
800 | Cd | 1.09 x 10-10 |
800 | Te | 2.52 x 10-10 |
700 | Cd | 5.12 x 10-12 |
700 | Te | 1.54 x 10-11 |
650 | Cd | 1.87 x 10-12 |
650 | Te | 2.80 x 10-12 |
600 | Cd | 8.70 x 10-14 |
600 | Te | 8.67 x 10-13 |
500 | Cd | 7.56 x 10-15 |
500 | Te | 9.50 x 10-15 |