Charge carrier generation, transport, and trapping in a photoconductive conjugated polymer: Polyphenylacetylene

Kang, En‐Tang; Ehrlich, P.; Bhatt, Alok; Anderson, Wayne A.

doi:10.1063/1.93410

Cited by 35 publications

(7 citation statements)

References 8 publications

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“…With recurrent π–π stacking between aromatic subunits, a large number of conjugated polymers are crystalline . The interface is one of the significant features of this class of materials, such as in hybrid polymer–metal oxide films for photovoltaic applications, in interpenetrating networks of electron donor and electron acceptor, in layered sandwich devices for charge injection, in fluorescence sensing, in optical nonlinearity, in chiral recognition and in light refraction, as shown in Fig. .…”

Section: Applications Of Cmpsmentioning

confidence: 99%

Design, preparation and application of conjugated microporous polymers

et al. 2013

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Conjugated microporous polymers (CMPs) are of great interest because these types of materials have high specific surface area and pore diameters less than 2 nm. CMPs have found applications in the fields of hydrogen storage, heterogeneous catalysts, gas-permeable membranes and light-emitting organics. A large number of recent reports have demonstrated that CMPs can be prepared using several approaches like noble metal-mediated ethynyl, Sonogashira-Hagihara coupling, Suzuki coupling and Yamamoto coupling reactions. In this review, the synthetic routes, functionalization and potential applications of CMPs are systematically introduced.

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Section: Applications Of Cmpsmentioning

confidence: 99%

Design, preparation and application of conjugated microporous polymers

et al. 2013

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“…The charge transport can be divided into two mechanisms: band transport [ 56 ] and hopping transport [ 57 , 58 ], corresponding to the charge transport within and between polymer chains. In both cases, the phonon (vibration of atom) plays an important role.…”

Section: Electrical Conductivity and Charge Transport In Conjugated Pmentioning

confidence: 99%

Light-Emitting Devices with Conjugated Polymers

2011

IJMS

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“…The extensive synthetic efforts in the past two decades have created a great number of processable and stable polyacetylene derivatives with different substituents (“substituted polyacetylenes”), some of which have been found to possess unique materials properties such as γ-radiolysis susceptibility, optical activity, gas permeability, and liquid pervaporation capacity . The study on photoconductivity of substituted polyacetylenes, however, has been confined to only one group of this family of polymers, that is, poly(phenylacetylene) (PPA) and its derivatives. − It has been found that doping with acceptor molecules such as iodine (I 2 ) enhances the photosensitivity of PPA, the optimum of which is obtained for heterogeneous phases with a large interface area. The transition from amorphous to crystalline structure promotes the photosensitivity increase .…”

Section: Introductionmentioning

confidence: 99%

Structure−Property Relationships for Photoconduction in Substituted Polyacetylenes

Tang

Chen

et al. 1999

Chem. Mater.

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New photoconductive materials are explored from three groups of polyacetylenes: poly-(phenylacetylenes) s[HCdC(C 6 H 5 -p-R)] n s, poly(3-thienylacetylenes) s[HCdC(3-C 4 H 2 S-β-R′)] n s, and poly(1-alkynes) s{HCdC[(CH 2 ) m R′′]} n s, where R ) CH 3 (2), CO 2 (CH 2 ) 6 OCO-Biph-OC 7 H 15 (Biph ) 4,4′-biphenylyl; 3); R′ ) Si(CH 3 ) 3 (4), Br (5); and R′′ ) CO 2 (CH 2 ) 6 OCO-Biph-OC 9 H 19 (m ) 2; 6), 9-carbazolyl (m ) 3; 7) and OCO-Biph-OC 7 H 15 (m ) 9; 8). Photoconduction in the polyacetylenes under illumination of visible light is investigated using photoinduced xerographic discharge technique. In the pure (undoped) state, all the polyacetylenes except 5 show higher photosensitivity than do poly(phenylacetylene) (R ) H; 1), a well-studied photoconducting polyacetylene, and poly(9-vinylcarbazole), the bestknown photoconducting vinyl polymer. Among the polyacetylenes, photoconduction performance of the polymers with electron-donating and/or hole-transporting moieties is superior to those with electron-accepting ones. The liquid crystalline polymer 6 exhibits very high photosensitivity, probably due to the formation of crystalline aggregates of its mesogenic pendants induced by the thermal treatment in the photoreceptor preparation process. C 60 acts as a photoconductivity enhancer when doped to amorphous 3, but functions as a crystallinity-breaking plasticizer when doped to liquid crystalline 6, leading to a large decrease in photoconductivity. While 3 shows a low photosensitivity (2.8 × 10 -3 lx -1 s -1 ) to a 573 nm light in the undoped state, doping with I 2 and sensitization with crystal violet (CV) dramatically increase its photosensitivity (up to 41.2 × 10 -3 lx -1 s -1 ). The CV-sensitized 4 exhibits high photoconductivity in the near-infrared spectral region, which may find technological applications in the digital photoimaging systems.

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Charge carrier generation, transport, and trapping in a photoconductive conjugated polymer: Polyphenylacetylene

Cited by 35 publications

References 8 publications

Design, preparation and application of conjugated microporous polymers

Design, preparation and application of conjugated microporous polymers

Light-Emitting Devices with Conjugated Polymers

Structure−Property Relationships for Photoconduction in Substituted Polyacetylenes

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