Journal of the Electrochemical Society, Vol.142, No.11, 3923-3927, 1995
Influence of Structural Order on the Luminescence of Oxide Spinels - Cr3+-Activated Spinels
The side bands and fine structure on the Cr3+ emission lines from a series of Cr3+-activated spinel compounds were used to investigate the relationship of structural order to luminescence properties. Spectra were measured at temperatures from 80 to 298 K on stoichiometric and defect magnesium aluminate and magnesium gallate spinels prepared at 1400 degrees C and reacted in hydrothermal vessels at various temperatures and a water pressure of 100 MPa. Structural disorder has the effect of broadening and smearing out the phonon fine structure of the Cr3+ emission. The luminescence linewidths begin to broaden at low levels of structural disorder.