Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지
DOI QR코드

DOI QR Code

Study on Properties of OLEDS using Zn(HPB)2 as Hole Blocking Layer

Zn(HPB)2를 Hole Blocking Layer로 이용한 OLEDS의 특성 연구

  • 김동은 (동아대학교 전기공학과) ;
  • 김두석 (동아대학교 항만물류시스템학과) ;
  • 이범종 (인제대학교 화학과) ;
  • 권영수 (동아대학교 전기공학과, 동아대학교 항만물류시스템학과)
  • Published : 2005.12.01
Download PDF
⟨ Previous Next ⟩

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 IP and EA were 6.5 eV and 3.0 eV, respectively. The PL and EL spectra of $Zn(HPB)_2$ were observed at the wavelength of 450 nm. 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 emiting material layer(EML) and cathode, and between hole transport layer(HTL) and emitting material layer(EML). We measured current density-voltage and luminance-voltage characteristics at room temperature.

Keywords

References

  1. R. F. Service, 'Organic light emitters gain longevity', Science, Vol. 273, No. 5277, p. 878, 1996
  2. 양기성, 김병상, 김두석, 신훈규, 권영수, 'ITO 기판의 산소 플라즈마처리에 의한 OLED의 전기적.광학적 특성에 관한 연구', 대한전기학회논문지, Vol. 54c, No. 1, p. 8, 2005
  3. K. S. Yang, H. K. Shin, C. Kim, and Y. S. K won, 'Photoluminescent and electrolumine scent investigation of OLEDs using $Alq_{2}$-Nq', Colloids and surfaces A, Vol. 257-258, p. 63, 2005
  4. C. W. Tang, S. A. Vanslyke, and C. H. Chen, 'Electroluminescence of doped organic thin films', J. Appl, Phys., Vol. 65, p. 3611, 1989
  5. S.-G. Liu, J.-L. Zuo, Y. Wang, Y.-Z. Li, and X.-Z. You, 'Synthesis, crystal structure and blue electroluminescence of a new zinc complex based on 2,6 - bis (benzimidazolyl)pyridine', Journal of physics and chemistry of solids, Vol. 66, No.5, p, 735, 2005 https://doi.org/10.1016/j.jpcs.2004.10.004
  6. T. J. Dingemans, A. Bacher, M. Thelakkat, L. G. Pedersen, E. T. Samulski, and H. - W. Schmidt, 'Spectral tuning of light emitting diodes with phenyl-thiophenes', Synthetic Metals, Vol. 105, No.3, p, 171, 1999
  7. Y. Kim and W. B. Im, 'Effect of hole-blocking layer doped with electrontransport molecules on the performance of blue organic light-emitting device', Phys, Stat. Sol. (a), Vol. 201, No.9, p, 2148, 2004
  8. N. Donze, P. Pechy, M. Gratzel, M. Schaer, and L. Zuppiroli, 'Quinolinate zinc complexes as electron transporting layers in organic light-emitting diodes', Chemical Physics Letters, Vol. 315, No. 5-6, p, 405, 1999
  9. V. Gebhardt, A. Bacher, M. Thelakkat, U. Stalmach, H. Meier, H.-W. Schmidt, and D. Haarer, 'Electroluminescent behavior of a homologous series of phenylenevinylene oligorners', Advanced Materials, Vol. 11, No.2, p. 119, 1999
  10. X. Wu, Y. Liu, and D. Zhu, 'Synthesis and characterization of a new conjugated polymer containing cyano substituents for light-emitting diodes', J. Mater. Chem., Vol. 11, No.5, p. 1327, 2001