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Proceedings Paper

Electrochemiluminescence properties of nematic liquid crystal cells doped with rubrene
Author(s): Michinori Honma; Takao Horiuchi; Masashi Tanimoto; Toshiaki Nose
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Paper Abstract

Light-emitting properties in liquid-crystal (LC) electrochemiluminescent (ECL) cells doped with an organic fluorescent dye (rubrene) were investigated. LC-ECL cells function based on the collision (recombination) of oppositely charged radical ions (anions and cations), which move by an external electric field applied across the cell. In this work, to obtain large values of luminance and current, a heating stir process was introduced in a preparation procedure of rubrene-doped LC. It was found that the heating stir process dramatically improves both of the luminance and current. It is considered that the drastic increase of the luminance and current density is caused by the increase of the actual dye concentration. Next, to obtain polarized emission based on the orientational nature of the nematic LC, emission properties of an LC-ECL cell with an interdigitated electrode were investigated. As a result, the polarized emission from orientating dyes was confirmed although its polarization ratio was not so high.

Paper Details

Date Published: 20 August 2009
PDF: 9 pages
Proc. SPIE 7414, Liquid Crystals XIII, 74140Y (20 August 2009); doi: 10.1117/12.826816
Show Author Affiliations
Michinori Honma, Akita Prefectural Univ. (Japan)
Takao Horiuchi, Akita Prefectural Univ. (Japan)
Masashi Tanimoto, Akita Prefectural Univ. (Japan)
Toshiaki Nose, Akita Prefectural Univ. (Japan)

Published in SPIE Proceedings Vol. 7414:
Liquid Crystals XIII
Iam Choon Khoo, Editor(s)

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