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▲ [15a-411-7] Plasmonic-enhanced photoluminescence of YAG:Ce+3 nanoparticles prepared in porous silica
Keywords:Rare earth elements, Plasmonics
Cerium doped yttrium aluminum garnet Y3Al5O12 (YAG:Ce3+) can be used for commercial production of white light emitting diodes as it emits bright yellow light (500-600 nm) under blue light excitation (455 nm). YAG:Ce3+ nanophosphors offer extra benefits over bulk, as it improves the efficiency by minimizing the background losses due to smaller size, and con accommodate high Ce3+ ions without affecting the proclivity stress of the nanocrystal. Homogeneous doping of such nanophosphors in silica glass offer extra benefits, because in such doping nanophosphors properties remains functional without affecting the transparency of the glass. Such hybrid glasses are used for industrial application, however, its production remains a challenge.
In this work, we have applied a low temperature wet sol-gel approach method to synthesize highly crystalline YAG:Ce3+ nanophosphors inside the pores of a mesoporous silica monolith (MSM). YAG:Ce3+ sol was used to imbibe MSM porous, and further annealing of imbibe MSMs resulted in highly crystalline YAG:Ce3+ nanophosphors, which formed in the porous of MSMs. The structural and optical properties of MSM-YAG:Ce3+ composites were investigated using XRD, TEM and PL spectroscopy.
In order to improve the photoluminescence and color quality of such structures, we utilized plasmonic properties of metal nanoparticles that attribute to a strongly enhanced plasmonic field (Fig.1 shows the strategy). Here, two different kinds of plasmonic nanoparticles with two different plasmonic resonance wavelengths, silver nanoparticles at 460 nm and gold nanoparticles at 532 nm (Fig.2.a), were used for excitation and emission enhancement of the MSM-YAG:Ce3+ composites, respectively. These nanoparticles were attached on the MSM-YAG:Ce3+ surface and a comparative photoluminescence study was performed (Fig.2b).
In this work, we have applied a low temperature wet sol-gel approach method to synthesize highly crystalline YAG:Ce3+ nanophosphors inside the pores of a mesoporous silica monolith (MSM). YAG:Ce3+ sol was used to imbibe MSM porous, and further annealing of imbibe MSMs resulted in highly crystalline YAG:Ce3+ nanophosphors, which formed in the porous of MSMs. The structural and optical properties of MSM-YAG:Ce3+ composites were investigated using XRD, TEM and PL spectroscopy.
In order to improve the photoluminescence and color quality of such structures, we utilized plasmonic properties of metal nanoparticles that attribute to a strongly enhanced plasmonic field (Fig.1 shows the strategy). Here, two different kinds of plasmonic nanoparticles with two different plasmonic resonance wavelengths, silver nanoparticles at 460 nm and gold nanoparticles at 532 nm (Fig.2.a), were used for excitation and emission enhancement of the MSM-YAG:Ce3+ composites, respectively. These nanoparticles were attached on the MSM-YAG:Ce3+ surface and a comparative photoluminescence study was performed (Fig.2b).