Poly(distyrylbenzene-block-sexi(ethylene oxide)), a highly luminescent processable derivative of PPV

Abstract

A block copolymer of distyrylbenzene with sexi(ethylene oxide) spacers displays high solid state photoluminescence efficiency (34%). Single layer light-emitting diodes with calcium or aluminium cathodes exhibit luminances over 2000 cd m-2 and efficiencies of 0.5 cd A-1.

Poly(pyridinium salt)s with organic counterions derived from an aromatic diamine containing tetraoxyethylene units exhibiting amphotropic liquid‐crystalline and photoluminescence properties

“…In recent years, they were also employed to enhance the solubility of π‐conjugated polymers and to fine‐tuning the emission of visible light for the exploitation of optoelectronic devices. Additionally, they provide a significant ionic conductivity that can, in principle, be exploited for fabricating light‐emitting electrochemical cells 26–30…”

Synthesis and electroluminescent properties of a novel copolymer with short alternating conjugated and non‐conjugated blocks

“…The TGA curve shown in Fig 1 indicates that the thermal stability of DSN–TEO is excellent and the decomposition temperature is high, up to 409 °C. DSC analysis showed a glass transition: at about 42.2 °C the introduction of 2,6‐naphthalene groups into the backbone decreases the glass transition temperature 8…”

“…We reported previously on the synthesis and application in LEDs and LECs of some poly( p ‐phenylene vinylene) (PPV)‐based copolymers, in which distyrylbenzene (DSB) segments are linked alternately with tri(ethylene oxide) or crown‐ether segments 4–7. Recently, Cacialli et al 8 also reported a high‐performance light‐emitting device that used a copolymer of DSB and sexi(ethylene oxide) as the emissive layer. To extend this research, we synthesized a novel greenish‐blue copolymer [poly(1,5‐di(3,5‐dimethyloxystyrylene)naphthalene‐ block ‐tri(ethylene oxide)) (DSN–TEO)], where the central benzene ring of DSB segment of the DSB‐based copolymer was substituted for an electron‐richer naphthalene ring.…”

Self-assembling structures and thin-film microscopic morphologies of amphiphilic rod–coil block oligomers

“…Yu and co-workers have reported the synthesis of rod-coil block copolymers containing OPV coupled to polyisoprene or poly(ethylene oxide) (PEO) and their self-assembling properties in bulk states [24,25]. Among them, the rod-coil block copolymers composed of OPV and PEO have excellent optoelectronic properties because the flexible PEO covalently connected to the OPV main chain not only provides a drastic enhancement of solubility in both organic and aqueous solvents, but also presents significant ionic conductivity and electron donor properties [26][27][28]. We previously reported that under different evaporation conditions rod-coil block oligomers containing the OPV dimer and the PEO with the average ethylene oxide unit of 16 could self-assemble into two kinds of nanostructural architectures on mica: nanoislands and nanoribbons [29,30].…”