Poly hole transport

PWM Blom, MJM de Jong, and JJM Vleggaar, Electron and hole transport in poly(p-phenylene) devices, Appl. Phys. Lett., 68 3308-3310, 1996. 

PWM Blom and MCJM Vissenberg, Dispersive hole transport in poly(p-phenylene vinylene), Phys. Rev. Lett., 80 3819-3822, 1998. 

S. Liu, X. Jiang, H. Ma, M.S. Liu, and A.K.-Y. Jen, Triarylamine-containing poly(perfluorocy-clobutane) as hole-transporting materials for polymer light-emitting diodes, Macromolecules, 33 3514-3517, 2000. 

Martens HCF, Blom PWM, Schoo HEM (2000) Comparative study of hole transport in poly(p-phenylene vinylene) derivatives. Phys Rev B 61 7489... 

To avoid the barriers due to different HOMO and LUMO levels on different bases, many experimenters used DNAs made up of all the same base pairs, G Cs or A Ts. Carriers were introduced by injection at the contacts. Not unexpectedly, it was found that poly(dG)-poly(dC) exhibits p-type behavior, i.e., hole transport, while poly(dA)-poly(dT) exhibits n-type, i.e.. 

Research Focus Synthesis of poly( fluorene-co-triphenylamine) derivatives as hole transport polymers. 

Poly- and oligothiophenes are generally p-type (hole-transporting) semiconductors. In thiophene-S,S-dioxide (98AM551 98JOC5497), this modification results in de-aromatization of the thiophene unit and increases the electron affinity and electron-transport properties of the... 

Current state-of-the-art hole-transport and electron-transport materials [50] are shown in Figure 6.15. Hole-transport materials include oligo- (58) and polythiophenes (59) [51], poly(thienylene vinylenes) (60) [52], and pentacenes [53] (61). Electron-transport materials include copper phthalocyanine (3), hexadeca-fluoro copper phthalocyanine (62), naphthalenetetracarboxy dianhydride (63), and perylene tetracarboxy dianhydride (64). 

Poly silanes have a quantum efficiency of >30% and show a hole mobility of 10-4 cm2s-1V-1 at room temperature, independent of the side groups.37,38 Due to sufficient hole mobility, polysilanes are considered to be suitable materials for the hole-transporting layer in injection-type organic EL diodes.36 It is also known that polysilanes themselves can be efficient emission materials in the UV and visible regions. 

Poly(l -vinylpyrene)46, S7-S9 has hole transport characteristics similar to PVK59. ... 

C. Melzer, E.J. Koop, V.D. Mihailetchi, P.W.M. Blom, Hole transport in poly(phenylene vinylene)/methanofullerene bulk-heterojunction solar cells, Adv. Fund Mater. 14 (2004) 865-870. 

Electron hole transport composites consisting of poly(aniline-co-2-acrylami-do-2-methyl-propanesulfonic acid), (V), and silicon nanoparticles were prepared by Hsu [4] and then used to prepare light-emitting diodes and electrodes for thin film field effect transistors. 

Hole transport in polymers occurs by charge transfer between adjacent donor functionalities. The functionalities can be associated with a dopant molecule, pendant groups of a polymer, or the polymer main chain. Most literature references are of doped polymers. The more common donor molecules include various arylalkane, arylamine, enamine, hydrazone, oxadiazole, oxazole, and pyrazoline derivatives. Commonly used polymers are polycarbonates, polyesters, and poly(styrene)s. Transport processes in these materials are unipolar. The mobilities are very low, strongly field and temperature dependent, as well as dependent on the dopant molecule, dopant concentration, and the polymer host This chapter reviews hole transport in polymers and doped polymers of potential relevance to xerography. The organization is by chemical classification. The discussion mainly includes molecularly doped, pendant, and... 

Kanemitsu and Einami (1990) investigated the role of the polymer on hole transport in a series of 2-(p-dipropylaminophenyl)-4-(p-dimethylaminophenyl)-5-(o-chlorophenyl)-l,3-oxazole (OX) doped polymers. The polymers were a polyarylate (PA), bisphenol-A polycarbonate (PC), poly(methyl methacrylate) (PMMA), poly(styrene) PS, poly(vinyl chloride) (PVC), polyethylene terephthalate) (PET), and poly(vinyl butyral) (PVB). The glass transition temperatures of the polymers range from 322 (PVB) to 448 K (PA). The temporal features of the photocurrent transients were strongly dependent on the polymer. Figure 76 shows the results. The field was 4.0 x H)5 V/cm and the temperature 295 K. The transients were near rectangular for PS, PET, PA, and PMMA, and highly dispersive for PVC land PVB. This was attributed to the fact... 

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