Optical properties of CdSe nanocrystals in a polymer matrix

Cadmium selenide nanocrystals have been made in a transparent polymer matrix by synthesis at room temperature. Particle size is controlled by reaction time or reagent concentration. Larger nanocrystals (≳3 nm) show near-band-edge photoluminescence. Smaller ones have a broad emission extending across...

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Veröffentlicht in:Applied physics letters 1999-11, Vol.75 (20), p.3120-3122
Hauptverfasser: Firth, Andrea V., Cole-Hamilton, D. J., Allen, J. W.
Format: Artikel
Sprache:eng
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Zusammenfassung:Cadmium selenide nanocrystals have been made in a transparent polymer matrix by synthesis at room temperature. Particle size is controlled by reaction time or reagent concentration. Larger nanocrystals (≳3 nm) show near-band-edge photoluminescence. Smaller ones have a broad emission extending across the visible region. Atmospheric moisture causes the emission intensity to decrease but subsequent exposure to light reverses this and gives a material which is no longer quenched by moisture. The broad emission and stability against atmospheric moisture leads to possible device applications of a “white” phosphor.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.125250