Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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A Study on Properties of OLEDs using $Zn(HPB)_2$ as hole blocking layer

$Zn(HPB)_2$를 Hole blocking layer로 이용한 OLEDs의 특성 연구

  • Kim, Dong-Eun (Department of Electrical Engineering & CIIMPS, Dong-A university) ;
  • Kim, Byoung-Sang (Department of Electrical Engineering & CIIMPS, Dong-A university) ;
  • Kwon, Oh-Kwan (Department of Electrical Engineering & CIIMPS, Dong-A university) ;
  • Lee, Burm-Jong (Department of Chemistry, Inje University) ;
  • Kwon, Young-Soo (Department of Electrical Engineering & CIIMPS, Dong-A university)
  • 김동은 (동아대학교 전기공학과 & CIIPMS) ;
  • 김병상 (동아대학교 전기공학과 & CIIPMS) ;
  • 권오관 (동아대학교 전기공학과 & CIIPMS) ;
  • 이범종 (인제대학교 화학과) ;
  • 권영수 (동아대학교 전기공학과 & CIIPMS)
  • Published : 2005.07.07
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Abstract

Recently, organic light emitting diodes(OLEDs) is widely used as one of the information display techniques. We synthesized 2-(2-hydroxyphenyl)benzoxazole($Zn(HPB)_2$). We studied the luminescent properties of OLEDs using $Zn(HPB)_2$. The ionization potential(IP) and the electron affinity(EA) of $Zn(HPB)_2$ investigated using cyclic-voltammetry(C-V). The JP, EA and Eg were 6.5eV, 3.0eV and 3.5eV, respectively. The PL and EL spectra of $Zn(HPB)_2$ were observed at the wavelength of 4S0nm. We used $Zn(HPB)_2$ as an emitting layer and hole blocking layer. At the experiment about hole blocking effect, we inserted $Zn(HPB)_2$ between emitting material layer(EML) and cathode, and hole transport layer(HTL) and emitting material layer(EML). We measured current density-voltage and luminance-voltage characteristics at room temperature.

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