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Semiempirical Self-Consistent Field Modeling of the Ce+3 4f AND 5d Energy Levels in Solid State Luminescent Materials

  • Philip D. Rack (a1), Paul H. Holloway (a2), Ted A O'Brien (a3) and Michael C. Zerner (a3)


Rare earth doped semiconductors are known to be efficient luminescent materials. In particular, SrS and SrxS and SrxGa2S4 doped with Ce+3 have recently been explored as efficient blue cathodoluminsecent and electroluminescent materials for flat panel display applications. The blue emission in these materials is due to Ce+3 5d-4f transitions, and the transition energies are sensitive to the local chemistry of the Ce+3 ion. To understand the effect that the local chemistry has on the Ce+3 4f–5d emission spectrum, we used a self-consistent-field configuration interaction (SCF/CI) model to calculate the electronic spectrum of the Ce−3 ion embedded in a cluster representation of the semiconductor lattice. The effects of changing nearest neighbor anions and cations have been modeled and are in excellent agreement with the experimental spectroscopy. While vibronic transitions are not calculated in this model, the calculated line transitions were fit to Gaussian peaks to generate absorption and emission spectra. Calculated and experimental Ce3+ 4f–5d emission spectra are compared for different materials, and the observed spectral changes are correlated to an analysis of the magnitude of the ligand field splitting and the nephelauxetic effect in various host lattices. Computed atomic orbital electron populations support these arguments.



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1. O'Brien, T. A., Rack, P. D., Holloway, P. H., and Zemer, M. C., Journal of Luminescence 78, 245 (1998).
2. Pople, J.A., Beveridge, D.L., Approximate Molecular Orbital Theory, (McGraw-Hill, New York, 1970).
3. Sadlej, J., Semiempirical Methods of Quantum Chemistry, (Wiley, New York, 1985.)
4. Cotton, F. A., ChemicalApplications of Group Theory, 3rd ed. (John Wiley & Sons, New York, 1990).
5. Yamashita, N., Michitsuji, Y., and Asano, S., Journal of the Electrochemical Society 134, 2932 (1987).
6. Harris, D. C. and Bertolucci, M. D., Symmetry and Spectroscopy (Oxford University Press, New York, 1978).
7. Kotzian, M., Rosch, N., Schröder, H., and Zerner, M. C., Journal of the American Chemical Society 111, 7687 (1989).
8. Rack, P.D., Holloway, P.H., Sun, S.-S., Journal of the Society for Information Display 4 (4), 281 (1996).
9. Rack, P. D., Holloway, P. H., O'Brien, T. A., and Zerner, M. C., Journal of Applied Physics, 86 (5), 2377 (1999).


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