Photochemical half-cells using mixture films of fullerene-ethylenediamine adduct microparticles and polythiophene

Akiyama, Tsuyoshi; Matsumura, Satoshi; Matsuoka, Ken; Oku, Takeo; Yamada, S.

doi:10.1088/1742-6596/433/1/012010

Cited by 9 publications

(9 citation statements)

References 18 publications

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“…In all spectra, the characteristic emission peaks at approximately 620 and 670 nm are attributed to polythiophene films. 31,32 These emissions appear to originate from the excited state of the polyBiTh layer. Figure 7b shows the emission intensity at 670 nm, the lowest excited state fluorescence of polyBiTh.…”

Section: Resultsmentioning

confidence: 99%

Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C₆₀ as Electron Acceptor

2023

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Polybithiophene/poly(3,4-ethylenedioxythiophene)/indium-tin-oxide coated transparent glass electrodes were prepared by sequential electrochemical polymerization with cyclic voltammetry. The thickness of polybithiophene films was varied by the scan rate of applied potentials during polymerization. Obtained hierarchical polythiophene films were characterized by absorption spectra, fluorescence spectra, scanning electron microscopy, laser microscopy, and atomic force microscopy. Half-photocell properties of the hierarchical polythiophene thin films were evaluated by a three-electrode electrochemical cell in CH2Cl2 solution of electrolyte and C60 as a sacrificial electron acceptor under irradiation of monochromatic light. The thickness and absorbance of hierarchical polythiophene thin films increased by decreasing of scan rate of applied potentials during the polymerization of polybithiophene. While, maximum peaks of fluorescence intensity and internal quantum yield of cathodic photocurrent were observed at 20 nm thickness of polythiophene film under irradiation from the glass side of the transparent electrode. Almost maximum external quantum efficiencies of cathodic photocurrent were observed from 20 nm to 1.5 µm thicknesses of polythiophene films. These tendencies suggest that CH2Cl2 solution of C60 and electrolyte penetrate into the polybithiophene layer up to 1.5 µm.

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Section: Resultsmentioning

confidence: 99%

Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C₆₀ as Electron Acceptor

2023

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“…12 C 60 P function as electron acceptor for photoexciting donor molecules, such as polythiophene and porphyrin, owing to the photocurrent-generation and uorescence-quenching properties of the composite lms of C 60 P and polythiophene or porphyrin formed on electrodes. [18][19][20] In addition, C 60 P or densely packed C 60 P lm (C 60 PF) formed at liquid-liquid interface (liquid-liquid interfacial precipitation, LLIP), 19,[21][22][23][24] may work as photoexciting moiety because of the photocurrent-generation properties of the half-photocell containing C 60 PF on an electrode. 19 Electrochemical polymerization is a widely used approach for the preparation of a conductive polymer thin-lm on the electrode surface via electrolysis of an electrolyte-solution containing corresponding monomer molecule.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and photoelectric conversion of densely packed C₆₀–ethylenediamine adduct microparticle films-modified electrode covered with electrochemically deposited polythiophene thin-films

Banya,

Kumagawa,

Izumoto

et al. 2023

RSC Adv.

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“…4952 We also found that C 60 DAE adduct particles substantially enhanced the photocurrent generation from a polythiophene film in a wet-type half photocell. 50,53 Quite recently, we found that the solubilized C 60 DAE adduct works as an n-type semiconductor for polythiophene in a photovoltaic cell application. 54 Therefore, insoluble fullerene assembly films seem to be useful n-type organic semiconductor materials.…”

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Facile Fabrication and Photovoltaic Application of [60]Fullerene Assembly Films Formed by Reaction between Fullerene and Amines

Banya

Akiyama

Matsumoto

et al. 2014

Bulletin of the Chemical Society of Japan

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[60]Fullerene assembly films consisting of C 60 and 1,2-diaminoethane (ethylenediamine) were easily fabricated on an amino-group-modified substrate by an alternate immersion process. The C 60 -assembly film was characterized after confirming the film formation using transmission absorption spectroscopy, transmission electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. An inverted-type organic solar cell was fabricated by using the C 60 -assembly film as the acceptor layer in the photoactive layer of the solar cell. The resultant photoelectric conversion performances of the solar cells were evaluated using the photocurrent and photovoltage via the photoexcitation of polythiophene. The results suggested that the fabricated C 60 -assembly film works as an n-type semiconductor for polythiophene.Fullerenes are suitable as electron acceptor components in organic solar cells (OSCs), 1,2 artificial photosynthesis models, 35 and organic transistors; 68 they are highly attractive as organic n-type semiconductors. One of the reasons that fullerenes are efficient electron acceptors is their small reorganization energy in electron transfer. 911In OSCs, organic electronic material based photovoltaic devices such as dye-sensitized and organic thin-film solar cells have gained attention in novel renewable energy source applications because of their potential for low-cost, lightweight, and large-area processability.1214 Indeed, the carrier mobility of the organic films of the active layer is an important factor in the photoelectric conversion performance. 15,16 Controlling the orientation of fullerene assemblies is vital for fabricating useful fullerene-based n-type (acceptor) organic electronic materials. 1719 In particular, adjacent or aggregated fullerene structures seem to be suitable for fabricating n-type organic semiconductor materials or electron acceptor materials with high negative carrier mobilities. 2030 The number of fullerene derivatives exhibited as organic electronic materials is still limited compared with the number of donor material. 3133 Therefore, developing and improving a facile preparation method for fullerene derivatives is very important for the development of organic electronic materials.Additionally, the quality of the electric contact between the organic layer and the electrodes is one of the most important factors in determining device performance. 3439 One approach to improving the OSC performance is to modify C 60 -based selfassembled monolayers (C 60 -SAMs) at the interface between the inorganic and organic materials. 40,41 These C 60 -SAMs help suppress charge recombination between photoinduced holes and electrons at the inorganic/organic interface by preventing carrier trapping, as well as improving the photoinduced charge transfer properties.In relation to the above, one of the simplest chemical modification methods for the preparation of fullerene derivatives is an addition reaction between fullerenes and amines. 42,43 As the preparation method for C 60 -...

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Photochemical half-cells using mixture films of fullerene-ethylenediamine adduct microparticles and polythiophene

Cited by 9 publications

References 18 publications

Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C₆₀ as Electron Acceptor

Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C₆₀ as Electron Acceptor

Fabrication and photoelectric conversion of densely packed C₆₀–ethylenediamine adduct microparticle films-modified electrode covered with electrochemically deposited polythiophene thin-films

Facile Fabrication and Photovoltaic Application of [60]Fullerene Assembly Films Formed by Reaction between Fullerene and Amines

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Photochemical half-cells using mixture films of fullerene-ethylenediamine adduct microparticles and polythiophene

Cited by 9 publications

References 18 publications

Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C60 as Electron Acceptor

Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C60 as Electron Acceptor

Fabrication and photoelectric conversion of densely packed C60–ethylenediamine adduct microparticle films-modified electrode covered with electrochemically deposited polythiophene thin-films

Facile Fabrication and Photovoltaic Application of [60]Fullerene Assembly Films Formed by Reaction between Fullerene and Amines

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Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C₆₀ as Electron Acceptor

Photocurrent Generation Properties of Half-Photocell Consisting of Electropolymerized Hierarchical Polythiophene Thin Films as Photoexciting Electron Donor and C₆₀ as Electron Acceptor

Fabrication and photoelectric conversion of densely packed C₆₀–ethylenediamine adduct microparticle films-modified electrode covered with electrochemically deposited polythiophene thin-films