| 초록 |
Sky Blue emitters based on a pyrene core have been successfully synthesized by substitution with triphenylamine side group in the 1,6 or 2,7 positions. There are larger red shifts in the UV-visible absorption and PL spectra of the synthesized 1,6-substituted derivative compared to the 2,7-substituted derivative. When the synthesized compounds were used as emitting layers in non-doped OLED devices, a related trend was observed in their optical properties. In particular, the OLED device containing the 2,7-substituted derivative was found to exhibit excellent characteristics, with maximum EL emission at 467nm, sky blue emission with CIE coordinates of (0.12, 0.14), and external quantum efficiency of 2.87%. |
