Synthesis and Properties of Poly[di(1-naphthyl)-4-tolylamine] as a Hole Transport Material

Abstract

A novel hole-transporting poly[di(1-naphthyl)-4-tolylamine:DNTA] (PDNTA) has been developed. PDNTA was easily prepared by oxidative coupling polymerization of DNTA using FeCl3 as an oxidant. This polymerization produced regiocontrolled PDNTA with high molecular weights. PDNTA exhibited strong UV-vis absorption bands at 267 and 370 nm in chloroform solution. Their photoluminescence spectra showed a maximum peak band around 445-448 nm in the blue region. The organic light-emitting device (OLED) prepared by spin-casting PDNTA solution onto ITO-coated glass substrate in conjunction with Alq and LiF/Al, as an electron-transporting light-emissive layer and a metal cathode, respectively, showed a maximum luminescence of 25 000 cd/m 2 at 12.5 V.

Fluorene‐Carbazole Dendrimers: Synthesis, Thermal, Photophysical and Electroluminescent Device Properties

“…Coupling of 2,7-dibromo-9,9-dioctyl-9 H -fl uorene in excess carbazole under ( ∼ 65 ° C for TPD and ∼ 100 ° C for NPB), ease of crystallization and unsatisfactory morphological stability. [ 5,6 ] Recently, AHTMs with high T g such as dendritic carbazole molecules with a fl uorene core, [ 7,8 ] 1,4-bis( N-carbazolyl)benzene as a central unit and different numbers of diphenylamine moieties as the peripheral group, [ 9 ] 1,3,5-tris(2-(9-ethylcarbazolyl-3)ethylene)benzene, [ 10 ] 4,4 ′ ,4 ′ ′ -tri( N -dibenzocarbazolyl)triphenylamine [ 11 ] and monodisperse carbazole-based oligomers, [ 12 ] have been reported.…”

Electrochemical characterization of arylene vinylene oligomers containing triphenylamine and carbazole units

“…The chemical oxidative polymerization (using FeCl 3 ) of TPA derivatives like 4-alkyl [19,20], 4-nitro, or -CN triphenylamine [21], di(1-naphthyl)-4-anisilamine [22], and di(1-naphthyl) p-tolylamine [23] has been reported. The obtained polymers have relative high molecular weights, are easily soluble in organic solvents, and can be processed in free-standing films with good thermal stability.…”

Novel luminescent polymers containing backbone triphenylamine groups and pendant quinoxaline groups

“…Triarylamine (TAA) derivatives, small molecules [24][25][26] or polymers containing TAA units [27][28][29][30][31] are one type of the most widely used hole-transport materials because they are easily oxidized to form stable radical cations [32]. The incorporation of TAA segments into polymers can also improve their solubility and glass-formability.…”