ELECTRON-BEAM ACTIVATION OF ACCEPTORS IN MOVPE ZNSE-N

The influence of low-temperature (40 K) e-beam irradiation on the cath odoluminescence (CL) spectrum reconstruction of MOVPE ZnSe : N epilaye rs was studied. The maximum of the initial wide emission band shifted from 466 to 459 nm and the LO phonon structure appeared at a total exp osure dose greater than 10(18) cm(-2). Neither HE lamp nor N-2 laser i rradiation produced any spectral change. The observed reconstruction w as attributed to an acceptor activation by a destruction of N-H comple xes followed by a removal of free H atoms from the epilayer. This was initiated by ionization processes under the e-beam irradiation. (C) 19 98 Elsevier Science B.V. All rights reserved.