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New Amino Methyl Coumarin Derivative for OLED Blue Emitter

A new blue emitting material including coumarin moiety, 7-phenylamino-bis(4-methyl-coumarin) (P-DMC), was synthesized by Ullman reaction.[1] Optical and electronic properties were examined by UV-Vis. absorption spectrum, PL spectrum, and cyclic voltammetry. The UV-Vis. spectra of P-DMC in solution and film states showed maximum absorption wavelengths of 396 nm and 403 nm, respectively. The PL spectra of P-DMC showed maximum emission wavelengths of 449 nm and 488 nm in solution and film states. A non-doped OLED was fabricated using the synthesized material as an emitting material. The P-DMC compound exhibited efficient luminescence property. The EL spectrum of P-DMC had a maximum value of 482 nm.