한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지

Study on the characteristics of white organic light-emitting diodes using a new material

  • Shim, Hye-Yeon (Department of Molecular Electronic Engineering & Center for Organic Materials and Information Devices (COMID), Hongik Univ.) ;
  • Jeong, Ji-Hoon (Department of Chemical Engineering& Center for Organic Materials and Information Devices (COMID), Hongik Univ.) ;
  • Kwon, Hyuk-Joo (Department of Chemical Engineering& Center for Organic Materials and Information Devices (COMID), Hongik Univ.) ;
  • Cho, Young-Jun (Department of Chemical Engineering& Center for Organic Materials and Information Devices (COMID), Hongik Univ.) ;
  • Kim, Bong-Ok (GRACEL Corp.) ;
  • Kim, Sung-Min (GRACEL Corp.) ;
  • Kim, Chi-Sik (GRACEL Corp.) ;
  • Yoon, Seung-Soo (Department of Chemistry, Sungkyunkwan University) ;
  • Kim, Young-Kwan (Department of Chemical Engineering& Center for Organic Materials and Information Devices (COMID), Hongik Univ.)
  • Published : 2004.08.23
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, we synthesized a new red emitting material of a Red225 doped into $Alq_3$ (tris(8-quinolinolato)aluminum (III)) and fabricated white organic light-emitting diodes (OLEDs) with a simple device structure. With a blue emitting material of DPVBi (4,4'-bis(2,2'-diphenylvinyl)1,1'-biphenyl) that can transfer effectively both a hole and an electron, OLEDs with a narrow emission layer could be possible without a hole-blocking layer. Consequently, the driving voltage and stability of devices have been improved. The devices show the Commission Internationale d'Eclairage (CIE) chromaticity coordinates of (0.36, 0.35) at luminance of 2000 cd/$m^2$. The luminous efficiency is about 3.5 cd/A, luminance is about 12000 cd/$m^2$ and current density is about 350 mA/$cm^2$ at 12 V, respectively.

Keywords