Microfluidic White Organic Light-Emitting Diode Based on Integrated Patterns of Greenish-Blue and Yellow Solvent-Free Liquid Emitters

Naofumi Kobayashi, Takashi Kasahara, Tomohiko Edura, Juro Oshima, Ryoichi Ishimatsu, Miho Tsuwaki, Toshihiko Imato, Shuichi Shoji, Jun Mizuno

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We demonstrated a novel microfluidic white organic light-emitting diode (microfluidic WOLED) based on integrated sub-100-μm-wide microchannels. Single-μm-thick SU-8-based microchannels, which were sandwiched between indium tin oxide (ITO) anode and cathode pairs, were fabricated by photolithography and heterogeneous bonding technologies. 1-Pyrenebutyric acid 2-ethylhexyl ester (PLQ) was used as a solvent-free greenish-blue liquid emitter, while 2,8-di-tert-butyl-5,11-bis(4-tert-butylphenyl)-6,12-diphenyltetracene (TBRb)-doped PLQ was applied as a yellow liquid emitter. In order to form the liquid white light-emitting layer, the greenish-blue and yellow liquid emitters were alternately injected into the integrated microchannels. The fabricated electro-microfluidic device successfully exhibited white electroluminescence (EL) emission via simultaneous greenish-blue and yellow emissions under an applied voltage of 100 V. A white emission with Commission Internationale de l'Declairage (CIE) color coordinates of (0.40, 0.42) was also obtained; the emission corresponds to warm-white light. The proposed device has potential applications in subpixels of liquid-based microdisplays and for lighting.

Original languageEnglish
Article number14822
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 2015 Oct 6

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Organic light emitting diodes (OLED)
Microfluidics
Microchannels
Liquids
Electroluminescence
Photolithography
Anodes
Esters
Cathodes
Lighting
Color
Electric potential

ASJC Scopus subject areas

  • General

Cite this

Microfluidic White Organic Light-Emitting Diode Based on Integrated Patterns of Greenish-Blue and Yellow Solvent-Free Liquid Emitters. / Kobayashi, Naofumi; Kasahara, Takashi; Edura, Tomohiko; Oshima, Juro; Ishimatsu, Ryoichi; Tsuwaki, Miho; Imato, Toshihiko; Shoji, Shuichi; Mizuno, Jun.

In: Scientific Reports, Vol. 5, 14822, 06.10.2015.

Research output: Contribution to journalArticle

Kobayashi, Naofumi ; Kasahara, Takashi ; Edura, Tomohiko ; Oshima, Juro ; Ishimatsu, Ryoichi ; Tsuwaki, Miho ; Imato, Toshihiko ; Shoji, Shuichi ; Mizuno, Jun. / Microfluidic White Organic Light-Emitting Diode Based on Integrated Patterns of Greenish-Blue and Yellow Solvent-Free Liquid Emitters. In: Scientific Reports. 2015 ; Vol. 5.
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AU - Ishimatsu, Ryoichi

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