Synthesis and Luminescence Properties of a Novel Eu3+‐Containing Polysiloxane Copolymer

Abstract

AbstractThrough pre‐coordination and subsequent polymerization from vinyl‐functionalized complex monomer with polysiloxane prepolymer (synthesized by vinyltrimethoxysilane and diphenylsilanediol), a novel anti‐ultraviolet Eu3+‐containing polysiloxane copolymer was obtained. FT‐IR spectra and UV/Visible absorption spectra prove the structure of the copolymer. TG‐DTG analyses indicate the copolymer keeps stable up to 321°C. When excited at 365 nm, the copolymer exhibits a stronger red emission at 612 nm. And the CIE coordinates (x=0.648, y=0.336) are very close to the National Television Standard Committee standard. Further, the red LEDs fabricated with the copolymer on 365 nm‐emitting chips display superior luminance (52110 cd/m2). Finally, 30‐day UV aging test only shows luminance loss of 6% and power efficiency loss of 7.3%, so the UV‐aging resistance of the copolymer is realized. All the results indicate that the Eu3+‐containing organosilicon copolymer is a promising anti‐ultraviolet red candidate.