A luminescence and electron paramagnetic resonance study was made of V-related defects. Isolated V in the 3 charge states, VZn3+(A+){3d2}, VZn2+(A0){3d3}, VZn+(A-){3d4}, could be identified by broad luminescence bands which exhibited weak no-phonon lines. The use of excitation spectroscopy revealed donor and acceptor levels at Ec - 1.55eV (12500/cm) and Ev + 1.17eV (9400/cm), respectively. The electron paramagnetic resonance spectra proved that the isolated V defect existed in 2 charge states, VZn3+(A+) and VZn2+(A0). Two other trigonal electron paramagnetic resonance spectra were attributed to V-related defect pairs, VZn2+-YTe and VZn3+-XTe.

J.Kreissl, K.Irmscher, P.Peka, M.U.Lehr, H.J.Schulz, U.W.Pohl: Materials Science Forum, 1995, 196-201, 773-8