한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지

White Light-Emitting Diodes Using Conjugated Polymer Blends

  • Hwang, Do-Hoon (Dept. of Applied Chemistry, Kumoh National Institute of Technology) ;
  • Park, Moo-Jin (Dept. of Applied Chemistry, Kumoh National Institute of Technology) ;
  • Kim, Suk-Kyung (Dept. of Applied Chemistry, Kumoh National Institute of Technology) ;
  • Lee, Chang-Hee (School of Electrical Engineering and Computer Science, Seoul National University) ;
  • Kim, Yong-Bae (Liquid Crystal Research Center, Department of Chemistry, Kon-Kuk University)
  • Published : 2004.08.23
Download PDF
⟨ Previous Next ⟩

Abstract

We report the characterization of white light emitting devices fabricated using conjugated polymer blends. Blue emissive poly[9,9-bis(4'-n-octyloxyphenyl) fluorene-2,7-diyl-co-10-(2'-ethylhexyl)phenothiazine-3,7-diyl] [poly(BOPF-co-PTZ)] and red emissive poly(2-(2'-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene) (MEH-PPV) were employed in the blends. The inefficient energy transfer between these blue and red light emitting polymers (previously deduced from the PL spectra of the blend films) enables the production of white light emission through control of the blend ratio. The PL and EL emission spectra of the blend systems were found to vary with the blend ratio. The EL devices were fabricated in the ITO/PEDOT/blend/LiF/Al configuration and white light emission was obtained for one of the tested blend ratios.

Keywords