Improvement of efficiency for OLED using Zn(HPB)q as electron transporting layer

Author

Park, Jun-Woo ; Kim, Dong-Eun ; Kim, Byoung-Sang ; Kang, Hyen-Wook ; Lee, Burm-Jong ; Kwon, Young-Soo

Author_Institution

Dept. of Electr. Eng. & NTRC, Dong-A Univ., Busan, South Korea

fYear

2010

fDate

17-20 Aug. 2010

Firstpage

970

Lastpage

973

Abstract

We synthesized a new material, (2-(2-hydroxy phenyl)benzo xazole)(8-hydoxyquinoline) [(Zn(HPB)q] which has low molecular compound and studied the improvement of OLED using Zn(HPB)q. The PL spectrum of Zn(HPB)q was yellowish green at a wavelength of 532 nm. Through cyclic-voltammetry, the ionization potential (IP) and the electron affinity (EA) were found to be 6.8 eV and 3.5 eV, respectively. We observed the possibility of Zn(HPB)q as electron transporting layer (ETL). Zn(HPB)q has been investigated as an ETL in the OLED and the optimal thickness of the Zn(HPB)q layer is about 10nm. We have obtained an improvement of luminance and decrease of turn-on voltage using Zn(HPB)q as ETL.

Keywords

electron affinity; ionisation potential; organic light emitting diodes; organic semiconductors; photoluminescence; voltammetry (chemical analysis); zinc compounds; (2-(2-hydroxy phenyl)benzo xazole)(8-hydoxyquinoline); OLED; PL spectrum; Zn(HPB)q; cyclic-voltammetry; electron affinity; electron transporting layer; electron volt energy 6.8 eV to 3.5 eV; ionization potential; low molecular compound; wavelength 532 nm;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on

Conference_Location

Seoul

ISSN

1944-9399

Print_ISBN

978-1-4244-7033-4

Electronic_ISBN

1944-9399

Type

conf

DOI

10.1109/NANO.2010.5698001

Filename

5698001