A new europium (Ⅲ) complex, EuL3phen, ［HL=4,4,4-trifluoro-1-(4’-m-terphenyl)-1, 3-butanedione, phen=1,10-phenanthroline］ was synthesized. Itsstructure was characterized by elemental analysis, IR and FAB-MS. The complexexhibits strongly red emission due to the 5D0—7FJ(J=0-4) transitions of Eu3+ions under irradiation of UV or 395 nm emission light of InGaN chip. Thestrongest emission peak is located at 613 nm. The luminescence quantum yieldis13%. The lifetime of the complex is 470 μs. The decay curve can be fit with asingle exponential. The thermogravimetric analyses curve for the complex showsthat the complex is stable up to 220 ℃, which meets the requirement offabrication of LED device. A red luminescent LED was successfully fabricated bycoating complex EuL3phen onto 395 nm emitting InGaN chip. The mass ratio ofcomplex to the silicone is related to the chromaticity coordinates and efficiencyof fabricated LED. When the mass ratio of complex to the silicone is 1∶25, thechromaticity coordinates of the fabricated LED with the europium complex arex=0.64 and y=0.35 and the efficiency achieves 0.89 lm?W-1. The results indicatethat the complex may act as a potential red component in the fabrication of whiteLEDs.Luminescence