Title :
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
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;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-7033-4
Electronic_ISBN :
1944-9399
DOI :
10.1109/NANO.2010.5698001
