Fabrication and characterization of large-area flexible microfluidic organic light-emitting diode with liquid organic semiconductor

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

Research output: Contribution to journalArticle

24 Citations (Scopus)


We propose simple and high-throughput fabrication of large-area flexible microfluidic organic light-emitting diodes (microfluidic OLEDs). Flexible electro-SU-8-microchannels with a liquid emission layer were fabricated by the following four steps: (a) screen printing for transparent electrodes, (b) novel belttransfer exposure for SU-8, (c) heterogeneous low-temperature bonding using self-assembled monolayers (SAMs), and (d) injecting a liquid emitter into the microchannels. 1-Pyrenebutyric acid 2-ethylhexyl ester (PLQ), which is on of liquid organic semiconductors, was used as a liquid emitter. The liquid emitter successfully filled the flexible microchannels, and electroluminescence was obtained both in flat and curved states. The proposed microfluidic OLED is applicable for future flexible posters or displays, and can be adopted around curved surfaces.

Original languageEnglish
Pages (from-to)231-236
Number of pages6
JournalSensors and Actuators, A: Physical
Publication statusPublished - 2014 Sep 1



  • Belt-transfer exposure
  • Flexible OLED
  • Liquid OLED
  • Liquid emitter
  • Liquid organic semiconductor
  • Microfluidic OLED

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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