Flexible White Organic Light-Emitting Diodes Based on Single-Walled Carbon Nanotube:Poly(3,4-ethylenedioxythiophene)/Poly(styrene sulfonate) Transparent Conducting Film

Single-walled carbon nanotube:poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate) hybrid film (SWCNT:PEDOT/PSS) hybrid conducting film was obtained by using spray-coating technique, based on which a white flexible organic light emitting diode (FOLED) was fabricated with the structure of SWCNT:PEDOT/PSS/N,N-diphenyl-N,N-bis(1-napthyl)-1,1-biphenyl-4,4-diamine/5,6,11,12-tetraphenylnaphthacene:4,4'-bis(2,2'-diphenylvinyl)-1,1'-biphenyl/4,7-diphenyl-1,1'-phenanthroline/LiF/Al. The hybrid film exhibited superior surface morphology, electrical conductivity to the pure SWCNT network. The as-fabricated FOLED showed a stable white emission that is close to the equi-energy white point upon bending, and the light-emitting efficiency of the device was significantly improved by using the hybrid film as anode. The hybrid film holds promise for application in flexible lighting and display. (C) 2012 The Japan Society of Applied Physics