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Efficient energy transfer in layered hybrid organic/inorganic nanocomposites: A dual function of semiconductor nanocrystals
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10.1063/1.3319838
/content/aip/journal/apl/96/8/10.1063/1.3319838
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/8/10.1063/1.3319838
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Figures

Image of FIG. 1.
FIG. 1.

(a) Repeat unit of the poly[9,9-bis(-[(N,N-dimethyl)-N-ethylammonium]-propyl)-2,7-fluorene-alt-1,4-phenylene] dibromide (PDFD). (b) Schematic representation of a CdTe NC capped with thioglycolic acid. (c) Schematic representation of a hybrid LbL PDFD/NC nanocomposite. (d) Steady-state absorption (solid lines) and PL (dashed line) spectra at the excitation wavelength of 370 nm. (e) PLE spectra at the emission wavelength of 650 nm. PDDA/NCs composite—squares, PDFD/NC composite—circles. The absorption and PLE spectra of the PDDA/NCs composite are normalized at the wavelength of 470 nm to the corresponding values of the PDFD/NC spectra.

Image of FIG. 2.
FIG. 2.

(a) Energy transfer efficiency (squares) and quenching efficiency of the PDFD (triangles) in the PDFD/NC composite vs temperature. (b) Ratios of the ET rate to the radiative rate (stars) and of the nonradiative rate to the radiative rate (circles) of the PDFD within the PDFD/NC composite as a function of temperature. The curves are normalized to unity at .

Image of FIG. 3.
FIG. 3.

Intrinsic quantum efficiency vs temperature of the PDFD within nanocomposites with different morphologies: PDFD/NC LbL composite (circles), PDFD/PSS LbL composite (triangles), and bare PDFD layer (squares). The curves are normalized to unity at . The solid curves are results of an Arrhenius global data fit. The insets schematically illustrate corresponding nanostructures and volumes available for exciton diffusion (shaded regions).

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/content/aip/journal/apl/96/8/10.1063/1.3319838
2010-02-24
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Efficient energy transfer in layered hybrid organic/inorganic nanocomposites: A dual function of semiconductor nanocrystals
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/8/10.1063/1.3319838
10.1063/1.3319838
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