Microfluidic white organic light-emitting diode

researcher's name
小林 直史
理工学術院 基幹理工学研究科 電子物理システム学専攻


● Organic light-emitting diodes (OLEDs) have been expected for next generation of displays and lightings
● Recently liquid-OLEDs with liquid organic semiconductors (LOSs) have been developed
● Our research group proposed microfluidic OLEDs, which integrated liquid-OLEDs with microfluidic technologies (Fig. 1)


● Greenish-blue and yellow LOSs were applied as liquid emitters
● Integrated 60-µm microchannels were fabricated
● Greenish-blue and yellow liquid emitters were alternately injected into the fine microchannels (Fig. 3)
● White light was generated with simultaneous greenish-blue and yellow emissions (Fig. 4 (a), (b))


● Formation of crack-free light-emitting layer taking advantage of liquid flowability
● Recovery emission via reinjection of new LOSs
● On-demand multicolor light emission


● Next generation displays and lightings
● On-demand portable biochip


  • Fig.1 Microfluidic OLEDs technology
  • Fig.2 Concept of microfluidic white OLEDs (WOLEDs)
  • Fig.3 Fabrication result of microfluidic WOELDs
  • Fig.4 (a) EL spectrum and (b) CIE value of microfluidic WOLEDs

collaborative researchers

SHOJI, Shuichi Professor (Faculty of Science and Engineering School of Fundamental Science and Engineering Department of Electronic and Photonic Systems) (retired) , MIZUNO, Jun Guest Senior Researcher (retired)

posted: 2016/02/03