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Novel Silicon-containing Poly (p-phenylenevinylene) Related Polymers For Blue Light-emitting Diodes

Hwan-Kyu Kim, M. Ryu, Ki-Dong Kim, Ji Hoon Lee, Jongwook Park, Seong-Woo Cho
Published 1997 · Materials Science

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Abstract A new class of silicon-containing poly ( p -phenylenevinylene) -related polymers with a uniform π -conjugated segment, regulated by organosilicon units, shows two strong absorption bands around 312 and 352 nm, corresponding to the π-π * transition of the carbazole unit and the conjugated segments, respectively. The present polymers exhibit two strong photoluminescent peaks in the blue range of 420–480 nm and the green region of 540 nm. The latter is attributed to the carbazole segment. Their electroluminescence (EL) spectra similarly show two strong emissive bands in the blue region and the yellow region. The current-voltage ( I–V ) curve of a typical light-emitting device fabricated with a Al/SiPVKPPV/ITO glass structure shows a typical rectifying characteristic with a threshold voltage of 12 V.
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