BaSi2O2N2:Ce3+,Eu2+ phosphors were successfully synthesized via the solid‐state reaction method. Their luminescence properties were experimentally investigated and qualify them for further consideration as components in white light‐emitting diodes. In particular, BaSi2O2N2:Eu2+ phosphors have an efficient bluish–green emission band that peaks at 490 nm. Ce3+‐doped BaSi2O2N2 showed a bright emission band at 390 nm. A red shift tuning capability of emission bands was achieved by increasing the Eu2+ or Ce3+ contents. Measurements of the intensity of emission spectra suggested a concentration quenching effect for both Eu2+ and Ce3+. Analysis of the experimental results suggests that the enhancement of emission intensity in the produced codoped BaSi2O2N2:Ce3+,Eu2+ phosphors is due to resonance‐type energy transfer from Ce3+ to Eu2+ ions, which is predominantly governed by dipole–dipole interaction mechanism. The efficiency of energy transfer was calculated and the critical distance of energy transfer between Ce3+ and Eu2+ was determined as ∼25 Å.
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