Abstract
The spray pyrolysis process was applied to prepare oxynitride phosphor (SrSi 2 O 2-δ N 2+2/3δ :Eu 2+ ), and the luminescence properties were investigated. The prepared particles had a green emission and good excitation characteristics in the region of 400-450 nm. The SrSi 2 O 2-δ N 2+2/3δ :Eu 2+ particles had an oxygen-rich phase (8 ≈ 0). On the basis of the concentration quenching data, the dipole-dipole interaction was dominantly involved in the energy transfer between the Eu 2+ ions, and the critical distance was determined to be about 15.1 A. The oxynitride phosphor with a fine size and good luminescent properties could be successfully prepared by the spray pyrolysis.
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