Demonstration of assembly failure of light-emitting electrochemical cells

Hsing Lung Wang, Ten-Chin Wen, Chien Hsin Yang

Research output: Contribution to journalArticle

Abstract

Light-emitting electrochemical cells (LECs) have been fabricated by employing thin films of the blend poly(p-phenylene vinylene) (PPV) and waterborne polyurethane ionomer (WPUI) neutralized with lithium hydroxide, sandwiched between an anode (indium tin oxide coated glass, ITO) and a cathode (A1). The conjugated polymer is p-doped and n-doped on the opposite side of the polymer layer when the external bias is applied, and a light-emitting p-n junction is in-situ formed in this assembly. The counterions are provided by WPUI to make the matrix ionically conducting, which is necessary for doping. Green light emission was observed in this study with a onset voltage of about 2.4 v. The LEC characteristics of normal LEC devices and those that had experienced assembly failure were studied using cyclic voltammetry. The results of this study would be useful to the new researchers interested in fabricating and characterizing LECs.

Original languageEnglish
Pages (from-to)581-586
Number of pages6
JournalJournal of the Chinese Institute of Chemical Engineers
Volume34
Issue number5
Publication statusPublished - 2003 Sep 1

Fingerprint

Electrochemical cells
Demonstrations
Polyurethanes
Ionomers
ITO glass
Conjugated polymers
Light emission
Tin oxides
Indium
Cyclic voltammetry
Anodes
Polymers
Lithium
Cathodes
Doping (additives)
Thin films
Electric potential

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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Demonstration of assembly failure of light-emitting electrochemical cells. / Wang, Hsing Lung; Wen, Ten-Chin; Yang, Chien Hsin.

In: Journal of the Chinese Institute of Chemical Engineers, Vol. 34, No. 5, 01.09.2003, p. 581-586.

Research output: Contribution to journalArticle

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