Efficiency properties of OLED based on Zn(PQ)2 as electron transporting layer and hole blocking layer

Author

Park, Jun-Woo ; Choi, Gyu-Chae ; Kim, Byoung-Sang ; Kwon, Young-Soo ; Lee, Burm-Jong

Author_Institution

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

fYear

2010

fDate

20-23 Jan. 2010

Firstpage

761

Lastpage

764

Abstract

We have synthesized 8-hydroxy-7-propylquinoline (Zn(PQ)₂) to use in OLED. Photoluminescence (PL) peak of Zn(PQ)₂ was observed at 555 nm which showed yellow emission. In the cyclic voltammetry (CV) experiment, the HOMO and the LUMO of the Zn(PQ)₂ measured to be 6.7 eV and 3.3 eV. So we expected that Zn(PQ)₂ could be used as electron transporting layer (ETL) and hole blocking layer (HBL). In this study, we investigated the efficiency properties of OLED based on Zn(PQ)₂ as ETL and HBL. Prior to film deposition, ITO substrate performed surface treatment by UV-ozone for 1 minute. Improvement of the OLED performance can be attributed to the reduction of the electron injection barrier of the Zn(PQ)₂ layer.

Keywords

organic light emitting diodes; organic semiconductors; photoluminescence; surface treatment; voltammetry (chemical analysis); 8-hydroxy-7-propylquinoline; HOMO; LUMO; OLED; UV-ozone; cyclic voltammetry; electron injection barrier; electron transporting layer; hole blocking layer; photoluminescence; surface treatment; time 1 min; wavelength 555 nm; ETL; HBL; OLED; cyclic voltammetry;

fLanguage

English

Publisher

ieee

Conference_Titel

Nano/Micro Engineered and Molecular Systems (NEMS), 2010 5th IEEE International Conference on

Conference_Location

Xiamen

Print_ISBN

978-1-4244-6543-9

Type

conf

DOI

10.1109/NEMS.2010.5592267

Filename

5592267