Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5399232 | Journal of Luminescence | 2016 | 33 Pages |
Abstract
Phosphors for solid-state lighting, based on a number of different compositional schemes and driven by light from blue light-emitting diodes (LEDs) are widely used for lighting applications. The low efficiency of pump LEDs at high drive currents (droop effect) limits the amount of light produced by conventional LED and phosphor combination. Pumping with laser diodes (LDs) can circumvent this limitation. In this paper we report on the characterisation of individual and a mixture of KEu(WO4)2 (red), BaMg2Al16O27:Eu, Mn (green) and (Sr,Mg)2SiO4:Eu (blue) phosphors, excited by a CW-driven LD operating at 404Â nm. The activator ion in each of these phosphors is, respectively, Eu3+, Mn2+ and Eu2+. Characteristics of light produced with each phosphor, variations with incident light power and phosphor temperature as well as effects from phosphor ageing are described. Results of comparison between pumping with coherent and incoherent light at the same wavelength are also described.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Sara Al-waisawy, Wojciech M. Jadwisienczak, Jason T. Wright, David Pendrill, Faiz Rahman,