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Abstract
A new core material, indenopyrazine, was substituted with diphenylamine groups on the locations 2 and 8, to synthesize new green emitting material, DPA-SPY, for OLED, of which emission wavelength was changed by adjusting the dipole property and the conjugation length. And, DPA-SPY was used as an emitting material layer when non-doped devices were fabricated, and the features were checked: DPA-SPY showed a sharp green spectrum, as with the EL maximum wavelength of 500 nm, narrow FWHM of 49 nm, CIE coordinates of (0.288, 0.538), and luminous efficiency of 0.99 cd/A at the current density of 10 mA/cm2.
Acknowledgments
This research was supported by a grant (Catholic Univ.) from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy (MKE), Republic of Korea. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (No. 20090080199). This work was supported by the Technology Innovation Program funded by the Ministry of Knowledge Economy (MKE, Korea). This study was supported by a grant from the Strategy Project funded by the Ministry of Knowledge Economy (MKE), Republic of Korea.