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Dye doped concentric shell nanoparticles for enhanced photophysical performance of downconverting light emitting diodes

Journal Article · · Journal of Colloid and Interface Science
 [1];  [2];  [2];  [2];  [3];  [3];  [4]
  1. Rensselaer Polytechnic Inst., Troy, NY (United States); OSTI
  2. Bambu Vault LLC, Lowell, MA (United States)
  3. Rensselaer Polytechnic Inst., Troy, NY (United States)
  4. Univ. of Vermont, Burlington, VT (United States)
In this study, we examined the potential for perylene dye doped nanoparticles to enhance Light Emitting Diodes (LED) efficacy by minimizing π–π intermolecular aggregation, and enhancing photoluminescence and photostability of the dye molecules in the solid state. Towards this end, we encapsulated perylene dyes, suitably modified with a reactive silica precursor, into silica nanoparticles within a silica-dye-silica concentric layered shell. We found that the fluorescent yield was higher when the dye was embedded in a buried concentric shell within the silica nanoparticles (NPs) compared to an undoped shell/dye doped core nanoparticle morphology or unencapsulated dye with the same net dye concentration in solution. A strong dependence of relative quantum yield on dye doping concentration in the silica-dye-silica nanoparticles was observed. The uniform ~ 100 nm large silica-dye-silica layered nanoparticles were used to prepare transparent dye doped silica nanoparticle/silicone nanocomposites. Dye doped silica nanoparticle/silicone nanocomposites exhibited higher photostability than the unencapsulated dye samples during long time aging tests under a blue LED with a wavelength of 455 nm at 300 ± 3% mA for 24 h. Novel dye doped layered silica NPs and their nanocomposites offer scope for developing organic luminescent materials into efficient and color-tunable light emitters for low-cost display, lighting, and optical communication applications.
Research Organization:
Rensselaer Polytechnic Inst., Troy, NY (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0018182
OSTI ID:
1803279
Alternate ID(s):
OSTI ID: 1702390
Journal Information:
Journal of Colloid and Interface Science, Journal Name: Journal of Colloid and Interface Science Vol. 556; ISSN 0021-9797
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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