UV-emitting phosphors: synthesis, photoluminescence and applications

Abstract

UV‐emitting phosphors find uses in various applications, such as photocopying, phototherapy, sun tanning, etc. The phosphor requirements for these applications vary. Simple methods for preparing different UV‐emitting phosphors are described. Novel syntheses for some borates (SrB4O7:Eu, CeMgB5O10:Gd, GdBO3:Pr, LaB3O6:Ce,Bi, LaB3O6:Gd,Bi, LaB3O6:Ce, Ba2B5O9Cl:Eu), a silicate (Ba2SiO5:Pb), phosphates (Sr2−xMgxP2O7:Eu) and a sulphate (CaSO4:Eu) are reported. Photoluminescence spectra of the phosphors so prepared are presented and discussed in the context of applications like phototherapy and photocopying lamps, photoluminescent liquid crystal displays, radiophotoluminescence, etc. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Persistent UV phosphors for application in photo catalysis

“…UV-emitting phosphors have been also reported in the context of their applications (e.g., some borates, silicate, phosphates and sulphate), but their decay times are very short [22]. Borate phosphors with high efficiency, easy processibility, durability and long afterglow have attracted attention [23,24], including blue-emitting Ce-activated calcium aluminoborate [25].…”

Luminescence and energy transfer in Ce3+, Mn2+‐doped K2AEP2O7 (AE = Ca, Sr) phosphor

“…Among the diphosphates, SrM II P 2 O 7 (M = Mg, Cr, Cu) have shown interesting relationships among chemical constitution, crystal structure, and luminescence properties (7). SrMgP 2 O 7 -based compounds are known to be efficient phosphors (8)(9)(10) and as corrosion inhibitor pigments (11,12). The biocompatibility of calcium pyrophosphate (Ca 2 P 2 O 7 , CPP) has been demonstrated in numerous experiments; in addition, it was shown that CPP possesses osteostimulating and bioresorptive properties (13).…”

New ultraviolet B emission from gadolinium activated BaZrO3 phosphor - An electron paramagnetic resonance and optical study

“…Especially, the narrowband ultraviolet B radiation is used for curing many types of skin disorders. Also gadolinium activated crystallite has attracted considerable research interest owing to its UV emission in a narrow region (300-320) [8]. This narrow region showed remarkable therapeutic effects.…”