UVC emitting phosphors obtained by spray pyrolysis
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Elsevier B.V.
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Resumo
The broadband inter-configurational (4f(1)5d(1)-->4f(2)) emission of Pr(3+) doped in lanthanum orthophosphate (LaPO(4)) and in calcium pyrophosphate (Ca(2)P(2)O(7)) has been investigated under plasma excitation. The synthesis by spray pyrolysis at moderate temperature followed by a controlled annealing proves to be a very efficient way to produce good quality UVC emitting phosphor Ca(1.92)Pr(0.04)Na(0.04)P(2)O(7) (alpha phase). The emission of this phosphor in the wavelength range 200-350 nm has been measured with a prototype device, which can be employed for anti-microbial testing. (C) 2010 Elsevier B.V. All rights reserved.
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Trivalent praseodymium, Lanthanum orthophosphate, Calcium pyrophosphate, Spray pyrolysis, UVC Emission
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Inglês
Citação
Journal of Luminescence. Amsterdam: Elsevier B.V., v. 131, n. 4, p. 628-632, 2011.
