Abstract
Luminescence measurements in the vacuum ultraviolet of transitions on in have shown the presence of a weak band. The weakness of the band is explained by the spin-forbidden character of transitions from the ground state to this state, which is at lower energy than the spin-allowed bands. Upon excitation in the spin-allowed bands, both fast spin-allowed emission (τ=5 ns) and slow spin-forbidden emission (τ>2 μs) are observed. These results can be understood with a configurational coordinate diagram analogous to the Jablonski diagrams that are used to explain the fluorescence and phosphorescence from organic molecules.
- Received 28 August 1997
DOI:https://doi.org/10.1103/PhysRevB.57.R2025
©1998 American Physical Society