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Relevant academic research and scientific papers

A new approach to 4-arylstyrenes: microwave-assisted synthesis and photophysical properties

A convenient method was developed for the synthesis of 4-arylstyrenes containing residues of polycyclic aromatics or triphenylamine. The method is based on the microwave-assisted Suzuki—Miyaura cross-coupling reaction. The optical properties of the compou

Charge-transporting material and organic light-emitting device including the same

Disclosed are a charge transporting material and an organic light emitting device including the same. The organic light emitting device using the charge transporting material has a lower driving voltage and improved current efficiency and durability. The charge transporting material includes: a constituent unit (1) represented by below chemical formula 1 or 2; and a constituent unit (2) represented by below chemical formula 3 or 4.COPYRIGHT KIPO 2016

Polymers with alkyl main chain pendent biphenyl carbazole or triphenylamine unit as host for polymer light emitting diodes

The soluble styrene polymers, bearing dicarbazole, phenylcarbazole or phenyltriphenylamine side groups were investigated as a host material for green emitter in phosphorescent PLED devices. Those polymers were synthesized by free radical polymerization via azobisisobutyronitrile (AIBN) as initiator under 75 °C. All of the host materials exhibit high thermal stability with high decomposition (Td,5% weight loss > 398 °C) and glass transition temperatures (Tg > 172 °C). The HOMO (ca. -5.39 -5.69 eV) and LUMO (ca. -2.22 -2.41 eV) levels with the triplet energy of ca. 2.50-2.93 eV suggest that polymers are suitable for host materials for green emitter. The devices based on the emissive layers containing host materials doped with Ir(ppy)3 (4 wt%) display stable green emission with high device performances. The brightness and current efficiency reach 15,800 cd/m2 and 17.5 cd/A, respectively, at the optimum blending with 40 wt% 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazol (t-PBD). Furthermore, the device performance reached higher brightness (23,400 cd/m2) and current efficiency (12.3 cd/A) when mixture with 2,4,6-triphenyl-1,3,5-triazine (TRZ) and t-PBD.

Living anionic polymerization of styrene derivatives containing triphenylamine moieties through introduction of protecting group

We carried out the anionic polymerization of styrene derivatives containing the triphenylamine moieties, 4,4-vinylphenyltriphenylamine (A) and 4,4-vinylphenyl-N,N-bis(4-tert-butylphenyl)benzenamine (B), with a variety of initiators in tetrahydrofuran (THF

Arylamine compounds and their use in electronic devices

Provided are arylamine compounds having Formula I, II, III, or IV: wherein Ar is the same or different at each occurrence and is aryl having from 6 to 30 carbon atoms or heteroaryl having from 2 to 30 carbon atoms. Also provided are compositions comprisin

CHARGE TRANSPORT MATERIALS

Charge transport materials are provided, and methods for making the same.