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

Kobayashi N, Kasahara T, Edura T, Oshima J, Ishimatsu R, Tsuwaki M, Imato T, Shoji S, Mizuno J - Sci Rep (2015)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

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.

No MeSH data available.


Concept of the microfluidic WOLED.Greenish-blue and yellow liquid emitters are alternately injected into the integrated microchannels, and white-light emission can be generated by the simultaneous emissions of the two different color emitters.
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f1: Concept of the microfluidic WOLED.Greenish-blue and yellow liquid emitters are alternately injected into the integrated microchannels, and white-light emission can be generated by the simultaneous emissions of the two different color emitters.

Mentions: In this study, we propose a microfluidic WOLED that can be used as the subpixels of the display, as shown in Fig. 1. Integrated sub-100-μm-wide microchannels sandwiched between two electrodes are formed in the microfluidic WOLED. Greenish-blue and yellow liquid emitters are alternately injected into the microchannels, and white-light emission can be produced by the simultaneous greenish-blue and yellow emissions.


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

Kobayashi N, Kasahara T, Edura T, Oshima J, Ishimatsu R, Tsuwaki M, Imato T, Shoji S, Mizuno J - Sci Rep (2015)

Concept of the microfluidic WOLED.Greenish-blue and yellow liquid emitters are alternately injected into the integrated microchannels, and white-light emission can be generated by the simultaneous emissions of the two different color emitters.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4594091&req=5

f1: Concept of the microfluidic WOLED.Greenish-blue and yellow liquid emitters are alternately injected into the integrated microchannels, and white-light emission can be generated by the simultaneous emissions of the two different color emitters.
Mentions: In this study, we propose a microfluidic WOLED that can be used as the subpixels of the display, as shown in Fig. 1. Integrated sub-100-μm-wide microchannels sandwiched between two electrodes are formed in the microfluidic WOLED. Greenish-blue and yellow liquid emitters are alternately injected into the microchannels, and white-light emission can be produced by the simultaneous greenish-blue and yellow emissions.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.

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.

No MeSH data available.