Organic Glasses: A New Class of Photorefractive Materials

Lundquist, P. M.; Wortmann, Rüdiger; Geletneky, Christian; Twieg, Robert J.; Jurich, M.; Lee, V. Y.; Moylan, Christopher R.; Burland, D. M.

doi:10.1126/science.274.5290.1182

Cited by 246 publications

(79 citation statements)

References 26 publications

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“…Here, the chromophore also serves as a CTA, the molecules form amorphous glassy materials with maximized chromophore content and reduced tendencies of phase-separation. Examples of this approach are materials based on the pyridone derivative 2BNCM ( 68 ), [ 190 ] DHADC-MPN ( 65 ), [ 180 ] DCDHF ( 69 ) -based Table 4. Molecular parameters of some selected EO-chromophores, data taken from a) Ref.…”

Section: Multifunctional Materials/organic Lmw-glassesmentioning

confidence: 99%

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Organic Photorefractive Materials and Applications

2011

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This review describes recent advances and applications in the field of organic photorefractive materials, an interesting area in the field of organic electronics and promising candidate for various aspects of photonic applications. We describe the current state of knowledge about the processes involved in the formation of photorefractive gratings in organic materials and focus on the chemical and photo‐physical aspects of the material structures employed in low glass‐transition temperature amorphous composites and organic photorefractive glasses. State‐of‐the art materials are highlighted and recent demonstrations of photonic applications relying on the reversible holographic nature of the photorefractive materials are discussed.

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Section: Multifunctional Materials/organic Lmw-glassesmentioning

confidence: 99%

“…. Structure of multifunctional organic glass-forming materials: 68 2BNCM, [ 190 ] 69 DCDHF, [ 112 , 191 , 192 ] 70 DRDCTA, [ 193 ] 71 ECYENPA, [ 157 ] 72 Cz-C6-PDCST.…”

Section: Multifunctional Materials/organic Lmw-glassesmentioning

confidence: 99%

Organic Photorefractive Materials and Applications

2011

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“…Such a system was first introduced by Lundquist et al [62] in 1996. It is based on the bifunctional chromophore BCNM (depicted in Scheme 3) which also exhibits photoconductivity.…”

Section: Low Molecular Mass Glassesmentioning

confidence: 99%

Materials Design and Physics of Organic Photorefractive Systems

Zilker¹

2000

ChemPhysChem

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“…In the case of low T g polymers [10], which are today the most efficient ones, the chromophores can be orientated under the internal electric field, thus inducing strong modulations of the refractive index. These low T g materials are for example doped polymers (photoconducting polymers doped with non-linear chromophores), organic glasses [11] (low molar mass molecules exhibiting both photoconducting and non-linear properties), liquid crystals dispersed in photoconducting polymers [12]. In the case of high T g polymers, the orientation of the chromophores under electric field is achieved at higher temperatures.…”

Section: The Photorefractive Polymers: a New Class Of Photonic Materialsmentioning

confidence: 99%

Organic materials with optical properties

Guillon¹,

Gallani²,

Mager³

et al. 2000

Analusis

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Due to their unusual physical and chemical properties, fullerenes and their derivatives appear to be attractive candidates for the construction of supramolecular assemblies and advanced materials [1]. The recent progress in the C 60 chemistry allows the preparation of many fullerene derivatives covalently bonded to donor moities. These systems provide entries into intramolecular processes such as energy and electron transfer [2]. It should be pointed out that the C 60 group appears to be a particularly interesting electron acceptor in photochemical molecular devices because of its symmetrical shape, its large size and the properties of its π-electron system.The efficient photogeneration of long lived charge-separated states by photoinduced electron transfer is of particular interest for initiating photocatalytical reactions or for solar energy conversion (photovoltaic cells). Photovoltaic devices using thin films of interpenetrating bicontinuous networks of C 60 itself or of a C 60 derivative and a number of conjugated polymers have been demonstrated to be promising for large-area photodetectors and solar cells [3]. The film morphology is of crucial importance for the device performance. It is also well known that donor and acceptor molecules are generally incompatible and tend to a strong and uncontrolled phase separation. An alternative approach which has been developed recently is to create the bicontinuous network by chemically connecting the donor and acceptor molecules.The compound under consideration, a fulleropyrrolidine derivative substituted by an oligophenylenevinylene (OPV) moiety has been used for the construction of a solar energy conversion cell [4]. The fullerene-OPV hybrid material leads to a photoinduced charge separation by combining the C 60 electron acceptor and the OPV moiety electron donnor within a unique molecular architecture (see chemical formula on figure 1). A photovoltaic cell has been prepared by spin-casting thin films of this C 60 -OPV derivative on a glass substrate coated with indium-tin-oxide. The 100 µm Al electrode was vacuum evaporated on the films. In such a configuration, this new material is not only able to generate electrons and holes when irradiated, but provides also pathways for their recombination on the electrodes, thus producing a photocurrent. This original chemical approach is in agreement with the basic concepts for obtaining a photocurrent, and is a good illustration of the large possibilities offered by organic chemistry to provide new materials able to be used in photovoltaic devices.The light-collecting and energy-conversion efficiencies of this molecular photovoltaic system is not yet optimized, but further improvements could be expected if using new fullerene derivatives with a strong absorption in the visible range, able to achieve very fast charge separation and slow charge recombination. Microelectronics based on semi-conductors plays an important role in information technology since several decades. However, for the high rates needed for todays highl...

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Organic Glasses: A New Class of Photorefractive Materials

Cited by 246 publications

References 26 publications

Organic Photorefractive Materials and Applications

Organic Photorefractive Materials and Applications

Materials Design and Physics of Organic Photorefractive Systems

Organic materials with optical properties

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