Browse > Article
http://dx.doi.org/10.4313/JKEM.2005.18.12.1139

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

Kim, Dong-Eun (동아대학교 전기공학과)
Kim, Doo-Seok (동아대학교 항만물류시스템학과)
Lee, Burm-Jong (인제대학교 화학과)
Kwon, Young-Soo (동아대학교 전기공학과, 동아대학교 항만물류시스템학과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.18, no.12, 2005 , pp. 1139-1142 More about this Journal
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
OLEDs; Hole blocking; Cyclic voltammetry;
Citations & Related Records
연도 인용수 순위
  • Reference
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 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
6 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
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 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   DOI   ScienceOn
9 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
10 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