Change in quantum efficiency of self-assembled films based on PPV and ionic salt added PSS

Jinhan Cho, Kookheon Char, Jong D. Hong, Dong Young Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Electrical characteristics of self-assembled devices based on Poly(p-phenylene vinylene) (PPV), Poly(sodium 4-styrenesulfonate) (PSS) and carrageenan (CARRA) were investigated. Relative quantum efficiency of ITO/(PPV/PSS)20/Al device was significantly decreased with the increase of ionic strength of the PSS solution. In contrast, the relative quantum efficiency of ITO/(PPV/PSS)5/(PPV/CARRA)15/Al device prepared by inserting (PPV/CARRA)15 bilayers between the (PPV/PSS)5 film and Al electrode were increased with the increase of ionic strength in the PSS solution. The performance improvement of ITO/(PPV/PSS)5/(PPV/CARRA)15/Al device is believed to be due to the formation of a stable interface between the (PPV/CARRA) and the Al electrode as well as the enhancement of hole transporting characteristics of (PPV/PSS) bilayers with added ion salt.

Original languageEnglish
Pages (from-to)75-78
Number of pages4
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume371
Publication statusPublished - 2001 Dec 1
Externally publishedYes

Keywords

  • Electroluminescence (EL)
  • Poly(p-phenylene vinylene) (PPV)
  • Self-assembly method

ASJC Scopus subject areas

  • Condensed Matter Physics

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