In situ study on the reorientation of polymer chains in operating polymer diodes

Tzung-Fang Guo, Yang Yang

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A reflection-absorption Fourier-transform infrared spectroscopy experiment has been designed to in situ monitor poly(2-methoxy-5-(2- ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV)-based polymer light-emitting diodes under stress test. This method enables the in situ study of the co-relation between device performance and the conformational transformation of a conjugated polymer. The experimental results indicate that the plane of the conjugated π-electron cloud in MEH-PPV tends to align parallel to the substrate. This rearrangement enhances the π-π electron coupling and lowers the device operating voltage under high current densities.

Original languageEnglish
Pages (from-to)148-150
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number1
DOIs
Publication statusPublished - 2002 Jan 7

Fingerprint

retraining
diodes
electron clouds
polymers
high current
monitors
light emitting diodes
infrared spectroscopy
current density
electric potential
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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In situ study on the reorientation of polymer chains in operating polymer diodes. / Guo, Tzung-Fang; Yang, Yang.

In: Applied Physics Letters, Vol. 80, No. 1, 07.01.2002, p. 148-150.

Research output: Contribution to journalArticle

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