The formation of H complexes with double-donor impurities (S, Se) was studied by using magnetic resonance techniques. For both chalcogens, spectra were observed by using electron spin resonance. The spin Hamiltonian parameters were deduced from electron-nuclear double resonance and field scanned double resonance data. From these, the atomic structures of centres were determined. In S-doped material, the spectra corresponded to one S plus one H atom complexes. These were observed in a neutral paramagnetic state. In Se-doped material, a similar Se-H complex was formed, but other spectra corresponded to a structure which involved 2 inequivalent H atoms. This center was observed in an ionized state. In all cases, the chalcogen and H atoms formed a center which involved a trigonal arrangement of the impurities. The centres could be ionized, thus implying that no full H passivation took place.

Atomic Structure of Chalcogen-Hydrogen Complexes in Silicon C.A.J.Ammerlaan, P.T.Huy: Solid State Phenomena, 1999, 69-70, 583-8