Triarylamine-Containing Poly(perfluorocyclobutane) as Hole-Transporting Material for Polymer Light-Emitting Diodes

Long‐Lifetime Polymer Light‐Emitting Electrochemical Cells Fabricated with Crosslinked Hole‐Transport Layers

“…[21][22][23][24][25] Figure 1 shows their molecular structures and a schematic diagram of the device structure. The synthesis and characterization of PS-TPD-PFCB and VB-TCTA were reported elsewhere.…”

Crosslinkable Hole‐Transport Layer on Conducting Polymer for High‐Efficiency White Polymer Light‐Emitting Diodes

“…[4] To overcome this problem, a crosslinkable HTL has been developed for fabricating highefficiency LEDs, such as those based on fluorescent conjugated polymers and red phosphorescent emitters. [5][6][7][8][9] For blue LEDs, because most of the blue phosphorescent emitters possess quite high energy levels at their highest occupied molecular orbital (HOMO) (for example, the HOMO for bis(4′,6′-difluorophenylpyridinato) tetrakis(1-pyrazolyl)-borate (FIr6) is -6.1 eV), it is quite difficult to obtain efficient hole injection. In order to alleviate this problem, crosslinkable tetraphenylbiphenyldiamine (TPD, HOMO level at -5.3 eV) and tris(4-carbazole)triphenylamine (TCTA, HOMO level at -5.7 eV) have been developed to provide cascade hole injection and transport, in order to achieve high efficiency.…”

Ionic Liquid Used in Long-Lifetime Polymer Light-Emitting Electrochemical Cells

“…The two crosslinkable materials used here are polystyrene(PS) -N,N'-diphenyl-N,N'-bis(4-nbutylphenyl)-(1,1'-biphenyl)-4,4'-diamine(TPD)-perfluorocyclobutane(PFCB) (PS-TPD-PFCB) and 4,4',4''-tris(N-carbazoly) triphenylamine bis(vinlybenzylether) (VB-TCTA). Liu et al, 2000;Zhao et al, 2006;Jiang et al, 2002;Gong et al, 2003) Fig. 10 shows their molecular structures and a schematic diagram of the device structure.…”

“…The synthesis and characterisation of PS-TPD-PFCB and VB-TCTA were reported elsewhere. (Liu et al, 2000;Zhao et al, 2006;Niu et al, 2007) The advantages of using these two materials include solution-processability and simple thermal crosslinking with no side products involved. Both PS-TPD-PFCB and VB-TCTA were dissolved in 1,2-dichloroethane, and the 0.5 weight percent solutions were spin-cast at 3000rpm to form thin films on the PEDOT-PSS layer.…”