Core-structure effects of novel indenopyrazine derivatives for blue emitter.
A novel core material, indenopyrazine, has been substituted with ethyl, phenyl, tolyl or fluorenyl groups on the locations 6 and 12, to newly synthesize four blue-emitting materials for OLED. Their electro-optical properties were compared through UV-Vis absorption, PL spectra and cyclic voltammetry, according to substituents of the core system of indenopyrazine. Non-doped OLED devices were fabricated by using the synthesized materials as emitting material layers, and among them, SF-EPY showed a highly-efficient luminescence with EL spectrum of 458 nm, luminous efficiency of 2.62 cd/A and CIE coordinates of (0.152, 0.142) at a current density of 10 mA/cm2.
Park
Young-Il
YI
Department of Chemistry, The Catholic University of Korea, Bucheon 420-743, Republic of Korea.
Kang
Ji-Soung
JS
Kim
Soo-Kang
SK
Lee
Ji-Hoon
JH
Jaung
Jae-Yun
JY
Park
Jong-Wook
JW