Direct Condensation Method for the Preparation of Organic‐Nanoparticle Dispersions

Köstler, Stefan; Rudorfer, Andreas; Haase, A.; Satzinger, Valentin; Jakopič, Georg; Ribitsch, Volker

doi:10.1002/adma.200900081

Cited by 33 publications

(21 citation statements)

References 29 publications

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“…5 Recently, the versatile Suzuki coupling reaction has been utilized to introduce metal binding groups into fluorene alternating copolymers. 6 Our interest in the design of reversible multi-redox systems contains the synthesis of functionalized thianthrenes. 7 Thianthrene with π-donor properties is one of the expected central organic unit for the construction of new type of donor systems with structural and redox properties: a/ oxidation of thianthrene to the π radical cation species occurs reversibly, 8 b/ the thianthrene radical cation is thermodynamically stable, c/ thianthrene and oxidized thianthrene units constitute highly ordered arrays with intermolecular interactions involving both π-π stacking and S-S contact.…”

Section: Introductionmentioning

confidence: 99%

Thianthrene-based oligomers as hole transporting materials

Świst¹,

Sołoducho²,

Data³

et al. 2012

Arkivoc

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The thianthrene-arylene conjugated units have been designed and synthesized via Suzuki or Stille coupling reaction. The structures and properties of the synthesized compounds were characterized by 1 HNMR, 13 CNMR, MS, UV-Vis absorption spectroscopy, fluorescence spectroscopy as well as electrochemical measurements. The luminescent studies demonstrate that thianthrenes are good chromophores. Also the electrical properties of obtained films confirm the applicable potential of these novel aryl-based π-conjugated polymers for the development of various electrical and electrochemical solid-state devices.

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Section: Introductionmentioning

confidence: 99%

Thianthrene-based oligomers as hole transporting materials

Świst¹,

Sołoducho²,

Data³

et al. 2012

Arkivoc

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“…A method employing condensation of the vapor of the target material into a liquid dispersion medium was therefore developed next [603] to overcome the problems associated with the methods of precipitation or emulsion. For concentrated dispersions of OS-NPs, temperatures in different zones of a properly designed tube furnace are adjusted according to the target material ensuring that no condensation of the organic vapor occurs in the tube.…”

Section: Os-npsmentioning

confidence: 99%

Organic semiconductors for device applications: current trends and future prospects

Ahmad

2014

Journal of Polymer Engineering

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Abstract:With the rich experience of developing silicon devices over a period of the last six decades, it is easy to assess the suitability of a new material for device applications by examining charge carrier injection, transport, and extraction across a practically realizable architecture; surface passivation; and packaging and reliability issues besides the feasibility of preparing mechanically robust wafer/substrate of single-crystal or polycrystalline/ amorphous thin films. For material preparation, parameters such as purification of constituent materials, crystal growth, and thin-film deposition with minimum defects/ disorders are equally important. Further, it is relevant to know whether conventional semiconductor processes, already known, would be useable directly or would require completely new technologies. Having found a likely candidate after such a screening, it would be necessary to identify a specific area of application against an existing list of materials available with special reference to cost reduction considerations in large-scale production. Various families of organic semiconductors are reviewed here, especially with the objective of using them in niche areas of large-area electronic displays, flexible organic electronics, and organic photovoltaic solar cells. While doing so, it appears feasible to improve mobility and stability by adjusting π-conjugation and modifying the energy bandgap. Higher conductivity nanocomposites, formed by blending with chemically conjugated C-allotropes and metal nanoparticles, open exciting methods of designing flexible contact/interconnects for organic and flexible electronics as can be seen from the discussion included here.

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“…The observed splitting peaks at about 661 and 628 nm are attributed to Davydov doublet of the 0-0 band and the other two peaks at 542 and 584 nm to the doublet of the 0-1 band. The vacuum deposited pentacene film gives pronounced absorption peaks than spin-coated films and a slightly larger red-shift [15] respectively. This may be attributed to the presence of quasiamorphous phase in the film prepared from SAP and thinfilm phase in the films prepared from DMP and vacuum deposition [16].…”

Section: Optical Analysismentioning

confidence: 99%

Pentacene Active Channel Layers Prepared by Spin-Coating and Vacuum Evaporation Using Soluble Precursors for OFET Applications

Ochiai

Kumar

Santhakumar

et al. 2012

ISRN Condensed Matter Physics

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Pentacene OFETs of bottom-gate/bottom-contact were fabricated with three types of pentacene organic semiconductors and cross linked Poly(4-vinylphenol) or polycarbonate as gate dielectric layer. Two different processes were used to prepare the pentacene active channel layers: (1) spin-coating on dielectric layer using two different soluble pentacene precursors of SAP and DMP; (2) vacuum evaporation on PC insulator. X-ray diffraction studies revealed coexistence of thin film and bulk phase of pentacene from SAP and thin film phase of pentacene from DMP precursors. The field effect mobility of 0.031 cm 2 /Vs and threshold voltage of −12.5 V was obtained from OFETs fabricated from SAP precursor, however, the pentacene OFETs from DMP under same preparation yielded high mobility of 0.09 cm 2 /Vs and threshold value decreased to −5 V. It reflects that the mixed phase films had carrier mobilities inferior to films consisting solely of single phase. For comparison, we have also fabricated pentacene OFETs by vacuum evaporation on polycarbonate as the gate dielectric and obtained charge carrier mobilities as large as 0.62 cm 2 /Vs and threshold voltage of −8.5 V. We demonstrated that the spin-coated pentacene using soluble pentacene precursors could be alternative process technology for low cost, large area and low temperature fabrication of OFETs.

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Direct Condensation Method for the Preparation of Organic‐Nanoparticle Dispersions

Cited by 33 publications

References 29 publications

Thianthrene-based oligomers as hole transporting materials

Thianthrene-based oligomers as hole transporting materials

Organic semiconductors for device applications: current trends and future prospects

Pentacene Active Channel Layers Prepared by Spin-Coating and Vacuum Evaporation Using Soluble Precursors for OFET Applications

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