Electroluminescent fluorene‐based alternating polymers bearing triarylamine or carbazole moieties in the main chain: Synthesis and properties

Abstract

Two soluble conjugated polyfluorenes, poly {9,9-dioctylfluorene-2,7-diyl-co-4,4 0 -bis[2-(4-phenyl)-2-cyanovinyl]triphenylamine}(PF-BCT) and poly{9,9-dioctylfluorene-2,7-diyl-co-3,6-bis[2-(4-phenyl)-2-cyanovinyl]-9-octyl carbazole}(PF-BCC), have been synthesized from 2,7-dibromo-9,9-dioctylfluorene and 4,4 0 -bis[2-(4-bromophenyl)-2-cyanovinyl]triphenylamine or 3,6-bis[2-(4-bromophenyl)-2-cyanovinyl]-9-octyl carbazole comonomers through a Suzuki polymerization reaction. The copolymers are characterized by gel permeation chromatography, elemental analysis, thermogravimetric analysis. The polymers have good thermal stability with 5 wt % loss temperatures of more than 380 C. Cyclic voltammetry measurements show that the polymers present good electron and hole-injection abilities. PF-BCC possesses higher oxidization potential than that of PF-BCT, which indicates that PF-BCT has better hole injection ability. The photophysical properties of the polymers are investi-

Synthesis and Characterization of Triarylamine-Based Block Copolymers by Combination of C-N Coupling and ATRP for Photorefractive Applications

“…Because of the excellent charge transporting properties, triarylamine (TAA) derivatives have been intensively studied and been widely used in thin layer electrooptical devices such as electroluminescent, solar cell and photorefractive holograph [1][2][3][4]. Especially, the polymeric TAA derivatives exhibit extensive application prospects due to the potential advantages such as possibility of extended -conjugation and excellent film-forming property.…”

Arylamino‐functionalized fluorene‐ and carbazole‐based copolymers: Color‐tuning their CdTe nanocrystal composites from red to white

“…As mentioned, further promising candidates for technological applications are poly(carbazole)s. Polymers based on carbazole have good electroactive and photoactive properties due to their high hole‐transporting mobility, strong absorption in the ultraviolet spectral region, and blue light emission 21, 22. A further benefit is that the carbazole unit can raise the highest occupied molecular orbital (HOMO) energy level of the polymers 23. These bandgap variations are important to host other semiconductor moieties and to, thus, tune the emission color of the host–guest system.…”