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Opt Lett. 2010 Aug 1;35(15):2544-6. doi: 10.1364/OL.35.002544.

Photoluminescence of Sr(2)P(2)O(7):Bi(2+) as a red phosphor for additive light generation.

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Department of Materials Science, University of Erlangen-Nuremberg, Erlangen 91058, Germany.


We report on photoluminescence of Sr(2)P(2)O(7):Bi(2+) as a potential red-emitting phosphor for multichromatic light sources. If excited with blue light, photoluminescence of this compound spans the spectral range of about 600 to 760nm. Static and dynamic spectral data reveal the presence of two distinct emission centers. Based on bond covalency and emission lifetime, luminescence can clearly be assigned to Bi(2+) ions on Sr(1) and Sr(2) lattice sites, respectively. Energy transfer is observed from Bi(1) to Bi(2). Transfer efficiency, estimated from the lifetimes of the excited states, increases with increasing dopant concentration.

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