Thin films of Sm-, Sm/Cl- and Cl-doped material were grown by using metalorganic chemical vapor deposition methods. The electroluminescence spectra of the Sm/Cl-doped samples contained 3 satellite peaks in each of the 7nm ranges around the 3 dominant peaks that were present in Sm-doped samples. The Sm/Cl-doped samples also exhibited a photoluminescence that was attributed to the self-activated centers, but its intensity was less than 1% of that in Cl-doped samples. The effect of Cl co-doping upon Sm3+ luminescence properties was explained in terms of Sm-VZn (Zn vacancy)-Cl complex formation.

A.Kato, M.Katayama, A.Mizutani, Y.Hattori, N.Ito, T.Hattori: Journal of Applied Physics, 1994, 76[5], 3206-8