Broadband Light Harvesting and Fast Charge Separation in Ordered Self-Assemblies of Electron Donor–Acceptor-Functionalized Graphene Oxide Layers for Effective Solar Energy Conversion

Supur, Mustafa; Kawashima, Yuki; Mase, Kenji; Ohkubo, Kei; Hasobe, Taku; Fukuzumi, Shunichi

doi:10.1021/acs.jpcc.5b03303

Cited by 17 publications

(13 citation statements)

References 53 publications

(105 reference statements)

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“…The complementary absorption spectra of TAPPI and Cu(II)Pc and the quick transfer of photoproduced electrons were reasoned as the main cause for the enhanced photoelectronic response in the rGO/TAPPI/Cu(II)Pc film. The group of Fukuzumi reported on 3-dimensional (3-D) ordered assemblies of GO layers functionalized with tetrakis(1-methylpyridinium-4-yl)Por p-toluenesulfonate, N,N'-di(2-(trimethylammonium iodide)ethylene) perylenediimide (PDI), and Zn(II)Pc tetrasulfonic acid in water 181. The molar ratio between the cationic dyes (i.e., Por and PDI) was found to be essential.…”

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confidence: 99%

Chemical functionalization and characterization of graphene-based materials

et al. 2017

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Graphene-based materials (GBMs), with graphene, their most known member, at the head, constitute a large family of materials which has aroused the interest of scientists working in different research fields such as chemistry, physics, or materials science, to mention a few, arguably as no other material before. In this review, we offer a general overview on the most relevant synthetic approaches for the covalent and non-covalent functionalization and characterization of GBMs. Moreover, some representative examples of the incorporation into GBMs of electroactive units such as porphyrins, phthalocyanines, or ferrocene, among others, affording electron donor-acceptor (D-A) hybrids are presented. For the latter systems, the photophysical characterization of their ground- and excited-state features has also been included, paying particular attention to elucidate the fundamental dynamics of the energy transfer and charge separation processes of these hybrids. For some of the presented architectures, their application in solar energy conversion schemes and energy production has been also discussed.

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confidence: 99%

Chemical functionalization and characterization of graphene-based materials

et al. 2017

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“…In terms of optical properties, an additional pivotal aspect for such molecular systems is represented by their near‐unity fluorescence quantum yields, which guarantee the fabrication of high‐performance devices when perylene diimides are involved . Nowadays, taking advantages of the photo, thermal, and chemical stability of these light‐sensitive molecules, perylene diimides, and larger rylenes are widely used in light‐harvesting, photocatalysis, and optoelectronic applications …”

Section: Functionalization Of 2d Layers With Molecular Systemsmentioning

confidence: 99%

“…The devised approach represents a novel self‐assembled method to fabricate monolayer/thin‐layer sensitizers in optoelectronics devices. Alongside, 3D ordered GO layers functionalized with common redox‐active dyes, including an anionic Zn(II) phthalocyanine derivative, a cationic porphyrin and a cationic perylene diimide derivative, were obtained through electrostatic interaction in water . The GO composite effectively absorbs the light from UV to near‐infrared range due to the nonoverlapping absorption maxima of the three molecules and exhibits the higher photocurrent density when compared to only GO or dye molecules.…”

Section: Tunable Optical Response Of 2d Materials By Molecular Functimentioning

confidence: 99%

Functionalization of 2D Materials with Photosensitive Molecules: From Light‐Responsive Hybrid Systems to Multifunctional Devices

Zhao

Ippolito

Samorı́

2019

Advanced Optical Materials

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2D materials possess exceptional physical and chemical properties that render them appealing components for numerous potential applications in (opto)electronics, energy storage, sensing, and biomedicine. However, such unique properties are hardly tunable or modifiable. The functionalization of 2D crystals with molecules constitutes a powerful strategy to adjust and modulate their properties, by also imparting them new functions. In this framework, the combination of 2D materials with photosensitive molecules is a viable route for harnessing their light‐responsive nature. The latter takes full advantage of the extremely high sensitivity of 2D materials to subtle changes in the local environment and the capacity of photosensitive molecules to modify their intrinsic properties when exposed to electromagnetic fields. The hybrid molecule–2D materials can preserve the unique optical and electrical properties of 2D layers and can exhibit additional light‐tunable features. In this Progress Report, the protocols that can be pursued for the 2D material functionalization and switching mechanisms in photosensitive systems are reviewed, followed by an in‐depth discussion on their tunable optical properties and their exploitation when integrated in novel photoswitchable electronic devices. The opportunities and associated challenges to be tackled for the development of unprecedented and high‐performance light‐responsive devices are discussed.

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“…The sp 2 hybridised carbon pattern extending in two dimension helps in introducing different types of functional groups covalently by addition or substitution reactions. Attachment of small/large functional molecules like, diazonium salts, alkyl isocyanates, polymers, porphyrin and also bulky fullerene via substitution or additions reactions on GO have been reported to exploit the advantages by altering its properties and finding potential applications in several areas [7,8,9,10,11,12,13,14,15]. Some research has also been carried out to attach bulky fullerene molecules (like polyhydroxy fullerene, pyrrolidine fullerene, methanofullerene etc.)…”

Section: Introductionmentioning

confidence: 99%