Enhancement of Photocurrent Generation by Honeycomb Structures in Organic Thin Films

Heng, Liping; Zhai, Jin; Zhao, Yong; Xu, Jingkun; Sheng, Xia; Jiang, Lei

doi:10.1002/cphc.200600393

Cited by 38 publications

(35 citation statements)

References 27 publications

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“…Block copolymer selfassembly occurring simultaneously with both solvent evaporation and water condensation promotes the formation of highly structured hexagonal pattern of pores showing iridescence properties [111,122]. Other examples of honeycomb films based on coil-coil [123,124] or rod-coil [125][126][127][128] block copolymers were reported without focusing on the ability of the block copolymers to self-assemble into nanostructures. Well-organized honeycomb films were prepared from star polymers [88,129,130], miktoarm star polymer [131], core cross-linked star polymers [79,95,132,133], comb-like polymers [134], hyperbranched polymers [98], or dendritic copolymers [135].…”

Section: Effect Of Chemical Nature and Topology Of Polymers On Pore Omentioning

confidence: 96%

“…Honeycomb films were obtained from light-emitting poly(distyryldimethylbenzene-co-triethyleneglycol) rod-coil copolymer. The introduction of microstructure enhances photocurrent generation as compared to flat surfaces as a result of the improvement of the light-harvesting efficiency and also the charge separation and charge transfer [126]. Another reported example is the utilization of small molecule tetraphenylethene derivatives for the fabrication of highly emissive BF film, as a consequence of an aggregationinduced emission phenomenon [190].…”

Section: Optical Materialsmentioning

confidence: 98%

“…In both cases, light-sensitive honeycomb films based on semi-conductive NPs or conjugated polymers were used to improve the opto-electronic properties of organic thinfilm devices [126,161,174,176,[190][191][192].…”

Section: Stimuli-responsive Polymersmentioning

confidence: 99%

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Breath Figures: Fabrication of Honeycomb Porous Films Induced by Marangoni Instabilities

Muñoz‐Bonilla¹,

Save²,

Billon³

et al. 2015

Polymer Surfaces in Motion

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The creation of porous polymer surfaces is a center of interest in current research. Porous surfaces possess extremely high specific surface areas, thus allowing their employment in a large variety of applications including electronics, photonics or biotechnology [1,2]. Pore size and distribution can play a major role in selective transportation or in insulation processes amongst others [3]. Those porous materials with cavities in the micrometer size range are interesting in catalysis, sensors, membrane preparation or as scaffolds for composite materials. Moreover porous materials with pore dimensions comparable to the wavelength of visible light are of interest as photonic band-gaps and optical stop-bands.Structures with micrometer or submicrometer dimensions can be created using different templating methods [4,5]. A large variety of approaches have been developed and employed to prepare microporous structured materials, including the use of templates such as ordered arrays of colloidal particles to produce inverse opal structures [6][7][8][9], from transformed polymeric sphere arrays [10,11], using emulsion droplets as templates [12], employing natural biological templates [13][14][15][16], by

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Section: Effect Of Chemical Nature and Topology Of Polymers On Pore Omentioning

confidence: 96%

Section: Optical Materialsmentioning

confidence: 98%

See 1 more Smart Citation

Breath Figures: Fabrication of Honeycomb Porous Films Induced by Marangoni Instabilities

Muñoz‐Bonilla¹,

Save²,

Billon³

et al. 2015

Polymer Surfaces in Motion

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show abstract

“…Heng et al [18] demonstrated that the porous structure of photoelectrically functional polymer films can significantly improve the photocurrent generation compared with those of the corresponding smooth films. However, the poor mechanical properties of PVK, particularly its brittleness, and difficult processing, have become major obstacles in the fabrication of porous thin films from pure PVK.…”

Section: Introductionmentioning

confidence: 98%

Characterization and electrochemical behaviors of honeycomb-patterned poly(N-vinylcarbazole)/polystyrene composite films

et al. 2012

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Poly(N-vinylcarbazole)/polystyrene composites were prepared through simple radical polymerization of N-vinylcarbazole in the presence of polystyrene. Honeycomb-patterned composite thin films were fabricated by casting the composite solutions under humid conditions. The scanning electron microscopy (SEM) images of the resulting honeycomb pattern on the composites show a higher regular structure compared to those of films prepared from the poly(N-vinylcarbazole) homopolymer. The pressure-area isotherms and photoelectrochemical behaviors of the patterned films were also observed. The photoconductivity of the patterned thin films increased with increasing poly(N-vinylcarbazole) concentration. This enhancement is attributed to the effects of the honeycomb structures and the charge transfer across the donor/acceptor hybrid interface in the composite films.

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“…33 Honeycomb-patterned films of various polymers have been fabricated by this approach, and these structures show novel properties and potential applications. For example, the ordered honeycomb structures of a light-emitting conjugate polymer enhanced photocurrent generation 34 ; the honeycomb-patterned biodegradable polymer film was used as a scaffold for bone tissue engineering, on which hydroxyapatite was formed. 35 However, the honeycomb structures were mainly formed on solid substrates.…”

Section: Introductionmentioning

confidence: 99%

Poly(9‐vinylcarbazole)/silver composite nanotubes and networks formed at the air–water interface

Wang

Xin

Lee

et al. 2009

J of Applied Polymer Sci

137

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Silver-nanoparticle-doped poly(9-vinylcarbazole) (PVK) nanocomposites were prepared via the reduction of Ag þ ions and the self-assembly of PVK on AgNO 3 aqueous solution surfaces. The formed composite nanostructures depended strongly on the experimental temperature. Thick round disks of PVK surrounded by discrete Ag nanoparticles and/or with irregular holes formed at room temperature; nanotubes and micronetworks doped with Ag nanoparticles formed at about 30-40 C, and networks formed at higher temperature. Further investigation revealed that the nanotubes were transformed from thin round disks. The length of the PVK/Ag composite nanotubes were longer than 10 lm, and the average size of the embedded Ag nanoparticles was found to be about 3.5 nm. The composite networks were composed of round pores with diameters of several hundred nanometers and fine silver nanoparticles embedded in the thin polymer films that covered the pores. The formation of the nanotubes was a very interesting self-assembly phenomenon of the polymer at the air-water interface that has not been reported before.

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Enhancement of Photocurrent Generation by Honeycomb Structures in Organic Thin Films

Cited by 38 publications

References 27 publications

Breath Figures: Fabrication of Honeycomb Porous Films Induced by Marangoni Instabilities

Breath Figures: Fabrication of Honeycomb Porous Films Induced by Marangoni Instabilities

Characterization and electrochemical behaviors of honeycomb-patterned poly(N-vinylcarbazole)/polystyrene composite films

Poly(9‐vinylcarbazole)/silver composite nanotubes and networks formed at the air–water interface

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