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Correlation of Mn local structure and photoluminescence from CdS:Mn nanoparticles
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View: Figures


Image of FIG. 1.
FIG. 1.

PL spectra of and nanoparticles with diameter of . The inset shows radiative recombination processes. Process I is band-gap emission; process II is emission from deep traps; and process III is Mn to emission.

Image of FIG. 2.
FIG. 2.

EPR spectra of nanoparticles with diameter of (a) and the corresponding lightly (b) and heavily (c) doped samples in Fig. 1. The dashed lines show the background.

Image of FIG. 3.
FIG. 3.

EPR (a) and PL (b) spectra of colloids prepared via and processes.

Image of FIG. 4.
FIG. 4.

Variations of the intensities of EPR signals (, ) and PL from Mn in nanoparticles annealed at different temperatures. The change of the number of Mn per dot with dot size is also shown.

Image of FIG. 5.
FIG. 5.

Schemes of different locations of Mn ions in II–VI nanocrystals and corresponding EPR spectra. is related to located in the core of the nanocrystals; to located near the surface; and background signal to Mn clusters or Mn–Mn pairs. The spheres represent the nanoparticles, and the dots represent Mn ions.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Correlation of Mn local structure and photoluminescence from CdS:Mn nanoparticles