Enhanced electroluminescence from a conjugated polymer/ionomer blend

Tae Ho Kim, Jong Hyeok Park, Tae Woo Lee, O. Ok Park

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Poly [2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV) and poly (sodium 4-styrenesulfonate) ionomer (PSS-ionomer) blends were used as emitting layers in polymer light-emitting diodes (LEDs). The polymers were blended in various ratios, and their luminescent properties were compared with those of a MEH-PPV/polystyrene (PS) blend system. The MEH-PPV/PSS-ionomer and MEH-PPV/PS devices showed a much higher luminescent efficiency when compared with pure polymer devices, due to the dilution effect. The MEH-PPV/PSS-ionomer blend device achieved a more enhanced luminescent efficiency as compared with that of the MEH-PPV/PS device, due to polar groups in the PSS-ionomer, which may enhance the electron injection from the cathode to the emitting molecules. In addition, the turn-on voltage of the MEH-PPV/PSS-ionomer based on LEDs was also dramatically decreased.

Original languageEnglish
Pages (from-to)8567-8571
Number of pages5
Issue number25
Publication statusPublished - 2004 Nov

Bibliographical note

Funding Information:
This work was supported by the Brain Korea 21 Project, and the Center for Advanced Functional Polymers through KOSEF.

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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