UVC emitting phosphors obtained by spray pyrolysis

Philippe Guillot (1) , José Maur'Icio Almeida Caiut (2, 3) , Séverine Lechevallier (2) , Jeannette Dexpert-Ghys (2) , Bruno Caillier (1)

1 DPHE - Diagnostic des Plasmas Hors Equilibres
2 CEMES - Centre d'élaboration de matériaux et d'études structurales
3 Institute of Chemistry

The broadband inter-configurational (4f15d1\textrightarrow4f2) emission of Pr3+ doped in lanthanum orthophosphate (LaPO4) and in calcium pyrophosphate (Ca2P2O7) 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 Ca1.92Pr0.04Na0.04P2O7 (α phase). The emission of this phosphor in the wavelength range 200\textendash350 nm has been measured with a prototype device, which can be employed for anti-microbial testing.

Mots clés: Calcium pyrophosphate; Lanthanum orthophosphate; Spray pyrolysis; Trivalent praseodymium; UVC Emission

Domaines: Physique des plasmas [physics.plasm-ph]; Plasmas

Philippe Guillot, José Maur'Icio Almeida Caiut, Séverine Lechevallier, Jeannette Dexpert-Ghys, Bruno Caillier. UVC emitting phosphors obtained by spray pyrolysis. Journal of Luminescence, 2011, 131 (4), pp.628-632. ⟨10.1016/j.jlumin.2010.11.004⟩. ⟨hal-02537440⟩