Multi-color microfluidic electrochemiluminescence cells

Takashi Kasahara, Shigeyuki Matsunami, Tomohiko Edura, Ryoichi Ishimatsu, Juro Oshima, Miho Tsuwaki, Toshihiko Imato, Shuichi Shoji, Chihaya Adachi, Jun Mizuno

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We demonstrated multi-color microfluidic electrochemiluminescence (ECL) cells. 5,6,11,12-Tetraphenylnaphthacene (rubrene), 9,10-diphenylanthracene (DPA), tetraphenyldibenzoperiflanthene (DBP)-doped rubrene, and 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) dissolved in a mixed organic solvent of 1,2-dichlorobenzene and acetonitrile in the ratio of 2:1 (v/v) were used as yellow, blue, red, and green ECL solutions, respectively. Light emissions were confirmed using simple-structured ECL cells consisting of two indium tin oxide (ITO) coated glass substrates with an SU-8 spacer of thickness varying from 0.9 to 6 μm. The SU-8-based microfluidic ECL cells were fabricated using photolithography and heterogeneous bonding techniques through the use of epoxy- and amine-terminated self-assembled monolayers. The emitting layers were formed on-demand by injecting the chosen ECL solutions into the microchannels sandwiched between ITO anode and cathode pairs. Multi-color ECL was successfully obtained at the light-emitting pixels. The microfluidic ECL cells with DBP-doped rubrene solution showed a maximum luminance of 11.6 cd/m2 and the current efficiency of ca. 0.32 cd/A at 8 V. We expect that the proposed microfluidic device will be a highly promising technology for liquid-based light-emitting applications.

Original languageEnglish
Pages (from-to)225-229
Number of pages5
JournalSensors and Actuators, A: Physical
Volume214
DOIs
Publication statusPublished - 2014 Aug 1

Keywords

  • Electro-microfluidic
  • Electrochemiluminescence
  • Microfluidic ECL cells
  • Microfluidic OLED
  • Multi-color
  • Passive-matrix

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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  • Cite this

    Kasahara, T., Matsunami, S., Edura, T., Ishimatsu, R., Oshima, J., Tsuwaki, M., Imato, T., Shoji, S., Adachi, C., & Mizuno, J. (2014). Multi-color microfluidic electrochemiluminescence cells. Sensors and Actuators, A: Physical, 214, 225-229. https://doi.org/10.1016/j.sna.2014.04.039