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Full-Color Emission and Temperature Dependence of the Luminescence in Poly-P-phenylene ethynylene-ZnS/Mn2+ Composite Particles

Chen, W; Joly, A G; Malm, Jan-Olle LU ; Bovin, Jan-Olov LU and Wang, S (2003) In The Journal of Physical Chemistry Part B 107(27). p.6544-6551
Abstract
The synthesis of a nanocomposite material composed of anionic poly(phenylene ethynylene) (aPPE) polymer particles and ZnS/Mn2+ nanoparticles is described, and its luminescence properties are investigated. aPPE particles have two emissions, one in the blue (460 nm) and the other in the green (490 nm), that are assigned to the 0-0 transition and an excimer, respectively. ZnS/Mn2+ nanoparticles have an emission at 596 nm that is due to the T-4(1)-(6)A(1) transition of Mn2+ and an emission at 706 nm that is ascribed to defect-related luminescence. The blue, green, yellow, and red emissions make the composite a potential material for full-color displays. More interestingly, the relative intensities of the different emissions may be varied by... (More)
The synthesis of a nanocomposite material composed of anionic poly(phenylene ethynylene) (aPPE) polymer particles and ZnS/Mn2+ nanoparticles is described, and its luminescence properties are investigated. aPPE particles have two emissions, one in the blue (460 nm) and the other in the green (490 nm), that are assigned to the 0-0 transition and an excimer, respectively. ZnS/Mn2+ nanoparticles have an emission at 596 nm that is due to the T-4(1)-(6)A(1) transition of Mn2+ and an emission at 706 nm that is ascribed to defect-related luminescence. The blue, green, yellow, and red emissions make the composite a potential material for full-color displays. More interestingly, the relative intensities of the different emissions may be varied by changing the excitation energy. Infrared spectra reveal that interactions exist between the two particles; however, photoluminescence excitation and emission spectra as well as observations of luminescence lifetimes indicate that there is negligible energy transfer from the polymer particles to the ZnS/Mn2+ nanoparticles. Temperature studies reveal that the ZnS/Mn2+ particles in the nanocomposite have a significantly reduced thermal quenching energy relative to that of bare ZnS/Mn2+ nanoparticles. In addition, between room temperature and 90 degreesC, the luminescence of the ZnS/Mn2+ nanoparticles at 596 nm increases in intensity with increasing temperature. This surprising phenomenon is attributed to thermoluminescence and thermal curing of the particle surface upon heating. (Less)
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published
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keywords
NANOCLUSTERS, NANOCRYSTALS, SEMICONDUCTING POLYMER, OPTICAL-PROPERTIES, ZNS-MN2+ NANOPARTICLES, LIGHT-EMITTING-DIODES, ZNS-MN NANOPARTICLES, NANOCOMPOSITES, PHOTOLUMINESCENCE, CRYSTALS
in
The Journal of Physical Chemistry Part B
volume
107
issue
27
pages
6544 - 6551
publisher
The American Chemical Society
external identifiers
  • wos:000183921300010
  • scopus:0038718063
ISSN
1520-5207
DOI
language
English
LU publication?
yes
id
0cfc5264-a9a8-40d5-8d13-f117cbda28fb (old id 121842)
date added to LUP
2007-07-13 08:44:42
date last changed
2018-05-29 09:31:28
@article{0cfc5264-a9a8-40d5-8d13-f117cbda28fb,
  abstract     = {The synthesis of a nanocomposite material composed of anionic poly(phenylene ethynylene) (aPPE) polymer particles and ZnS/Mn2+ nanoparticles is described, and its luminescence properties are investigated. aPPE particles have two emissions, one in the blue (460 nm) and the other in the green (490 nm), that are assigned to the 0-0 transition and an excimer, respectively. ZnS/Mn2+ nanoparticles have an emission at 596 nm that is due to the T-4(1)-(6)A(1) transition of Mn2+ and an emission at 706 nm that is ascribed to defect-related luminescence. The blue, green, yellow, and red emissions make the composite a potential material for full-color displays. More interestingly, the relative intensities of the different emissions may be varied by changing the excitation energy. Infrared spectra reveal that interactions exist between the two particles; however, photoluminescence excitation and emission spectra as well as observations of luminescence lifetimes indicate that there is negligible energy transfer from the polymer particles to the ZnS/Mn2+ nanoparticles. Temperature studies reveal that the ZnS/Mn2+ particles in the nanocomposite have a significantly reduced thermal quenching energy relative to that of bare ZnS/Mn2+ nanoparticles. In addition, between room temperature and 90 degreesC, the luminescence of the ZnS/Mn2+ nanoparticles at 596 nm increases in intensity with increasing temperature. This surprising phenomenon is attributed to thermoluminescence and thermal curing of the particle surface upon heating.},
  author       = {Chen, W and Joly, A G and Malm, Jan-Olle and Bovin, Jan-Olov and Wang, S},
  issn         = {1520-5207},
  keyword      = {NANOCLUSTERS,NANOCRYSTALS,SEMICONDUCTING POLYMER,OPTICAL-PROPERTIES,ZNS-MN2+ NANOPARTICLES,LIGHT-EMITTING-DIODES,ZNS-MN NANOPARTICLES,NANOCOMPOSITES,PHOTOLUMINESCENCE,CRYSTALS},
  language     = {eng},
  number       = {27},
  pages        = {6544--6551},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part B},
  title        = {Full-Color Emission and Temperature Dependence of the Luminescence in Poly-P-phenylene ethynylene-ZnS/Mn2+ Composite Particles},
  url          = {http://dx.doi.org/},
  volume       = {107},
  year         = {2003},
}