5. Choice of materials according to excitation energy
The choice of phosphor depends on the excitation source to be used. A material that is effective under ultraviolet excitation is not necessarily so under a more energetic excitation, although one might think, a priori, that the higher the energy absorbed, the higher the energy emitted.
5.1 High-energy excitation (vacuum ultraviolet)
The search for luminophores suitable for excitation in the vacuum ultraviolet (VUV) has been motivated both by the development of plasma displays and video screens, and by the desire to find a way of eliminating the highly polluting mercury (Hg) in discharge lamps. An Xe-Ne mixture may be suitable, but its emission takes place mainly at 147 and 172 nm. VUV photons are absorbed more by the matrix than by the dopant ions, and energy...
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Choice of materials according to excitation energy
Luminescence for photovoltaics (PV)
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