Title :
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
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;
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
DOI :
10.1109/NEMS.2010.5592267
