P-D Charge Transfer Excitons In Zn1-Xnixo Under Inner Shell Excitation

The paper presents results of the study of two narrow luminescence lines I-1 and I-2 at the energies of 3.339 and 3.393 eV respectively in solid state solutions Zn1-xNixO. The luminescence spectroscopy with a sub-nanosecond time resolution upon selective photoexcitation in the energy range of the inner shell Zn M- edge absorption was used to promote the earlier proposed mechanism of the I-1 and I-2 lines origin. Photoluminescence spectra of solid state solutions Zn1-xNixO at fast and slow time windows under soft X-ray excitation are discussed. The doublet of I-1 and I-2 lines is believed to arise due to the radiative annihilation of p-d excitons. Different possible mechanisms of emergence of two narrow luminescence lines I-1 and I-2 in solid state solutions Zn1-xNixO are considered.