Title of article :
New light-emitting hyperbranched polymers prepared from tribromoaryls and 9,9-dihexylfluorene-2,7-bis(trimethyleneborate)
Author/Authors :
Li، نويسنده , , Zhongʹan and Di، نويسنده , , Chongʹan and Zhu، نويسنده , , Zhichao and Yu، نويسنده , , Gui and Li، نويسنده , , Zhen and Zeng، نويسنده , , Qi and Li، نويسنده , , Qianqian and Liu، نويسنده , , Yunqi and Qin، نويسنده , , Jingui، نويسنده ,
Abstract :
Three new hyperbranched polymers (P1–P3) were prepared by copolymerization of tribromoaryl moieties (triphenylamine, carbazole and fluorene moieties) with 9,9-dihexylfluorene-2,7-bis(trimethyleneborate) from “A2 + B3” approach based on Suzuki polycondensation reaction. They are soluble in common organic solvents, and exhibit good thermal stable luminescence. Interestingly, unlike most of fluorene-containing polymeric materials, P3 emits strong green light due to its special structure. Double-layer devices with configurations ITO/PEDOT/Polymer (50 nm)/TPBI(50 nm)/LiF(0.5 nm)/Al(80 nm) were fabricated and emitted blue or green light, with maximum luminance in the range of 25–142 cd/m2 and the current efficiency up to 0.18 cd/A.
