Search Results - "Umeyama, Tomokazu"

Donor−Acceptor Nanoarchitecture on Semiconducting Electrodes for Solar Energy Conversion by Imahori, Hiroshi, Umeyama, Tomokazu

“…Donor−acceptor molecules have been fabricated on a nanostructured semiconducting electrode for solar energy conversion (i.e., dye-sensitized bulk…”
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Effect of Silicon Surface for Perovskite/Silicon Tandem Solar Cells: Flat or Textured? by Kanda, Hiroyuki, Shibayama, Naoyuki, Uzum, Abdullah, Umeyama, Tomokazu, Imahori, Hiroshi, Ibi, Koji, Ito, Seigo

“…Perovskite and textured silicon solar cells were integrated into a tandem solar cell through a stacking method. To consider the effective structure of silicon…”
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An efficient electron transport material of tin oxide for planar structure perovskite solar cells by Murugadoss, Govindhasamy, Kanda, Hiroyuki, Tanaka, Soichiro, Nishino, Hitoshi, Ito, Seigo, Imahori, Hiroshi, Umeyama, Tomokazu

“…The photovoltaic performance of a perovskite solar cell based on a new electron conducting SnO2 film prepared at low temperature using different solvents was…”
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Effect of Fluorine Substitution on Photovoltaic Properties of Benzothiadiazole–Carbazole Alternating Copolymers by Umeyama, Tomokazu, Watanabe, Yusuke, Douvogianni, Evgenia, Imahori, Hiroshi

“…To investigate the effect of fluorine substitution on molecular and film structures, optical, electrochemical, and photovoltaic properties of a moderate…”
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Photodynamic and Photothermal Effects of Semiconducting and Metallic-Enriched Single-Walled Carbon Nanotubes by Murakami, Tatsuya, Nakatsuji, Hirotaka, Inada, Mami, Matoba, Yoshinori, Umeyama, Tomokazu, Tsujimoto, Masahiko, Isoda, Seiji, Hashida, Mitsuru, Imahori, Hiroshi

“…Semiconducting and metallic single-walled carbon nanotubes (s-SWNTs and m-SWNTs) were enriched by agarose gel chromatography and their photothermal and…”
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Effects of Alkyl Chain Length and Substituent Pattern of Fullerene Bis-Adducts on Film Structures and Photovoltaic Properties of Bulk Heterojunction Solar Cells by Tao, Ran, Umeyama, Tomokazu, Kurotobi, Kei, Imahori, Hiroshi

“…A series of alkoxycarbonyl-substituted dihydronaphthyl-based [60]­fullerene bis-adduct derivatives (denoted as C2BA, C4BA, and C6BA with the alkyl chain of…”
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Long-Range Interfacial Charge Carrier Trapping in Halide Perovskite‑C60 and Halide Perovskite-TiO2 Donor–Acceptor Films by Sachith, Bhagyashree Mahesha, Okamoto, Takuya, Ghimire, Sushant, Umeyama, Tomokazu, Takano, Yuta, Imahori, Hiroshi, Biju, Vasudevanpillai

“…Interfacial electron transfer across perovskite-electron acceptor heterojunctions plays a significant role in the power-conversion efficiency of perovskite…”
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Geometries, Electronic Couplings, and Hole Dissociation Dynamics of Photoinduced Electron–Hole Pairs in Polyhexylthiophene–Fullerene Dyads Rigidly Linked by Oligophenylenes by Miura, Taku, Tao, Ran, Shibata, Sho, Umeyama, Tomokazu, Tachikawa, Takashi, Imahori, Hiroshi, Kobori, Yasuhiro

“…To shed a light on fundamental molecular functions of photoinduced charge conductions by organic photovoltaic materials, it is important to directly observe…”
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Effective role of eco-friendly acetyl tributyl citrate in large-scale catalyst-free synthesis of waterborne polyurethanes without volatile organic compounds by Li, Xin-Gui, Xie, Yun-Bin, Huang, Mei-Rong, Umeyama, Tomokazu, Ohara, Tomoya, Imahori, Hiroshi

“…N-methyl pyrrolidone (NMP)-free waterborne polyurethane (WPU) in a two-tons scale was prepared without catalyst in the presence of a non-toxic acetyl tributyl…”
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Development of clean performance-tunable waterborne polyurethane using acetyl tributyl citrate for transferable holographic films by Li, Xin-Gui, Xie, Yun-Bin, Huang, Mei-Rong, Umeyama, Tomokazu, Imahori, Hiroshi

“…Scalable and transparent polyether-based waterborne polyurethane (WPU) thin films that adhere firmly to Al nanofilm but not to PET film without release agents…”
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Sustained photodynamic effect of single chirality-enriched single-walled carbon nanotubes by Fukuda, Ryosuke, Umeyama, Tomokazu, Tsujimoto, Masahiko, Ishidate, Fumiyoshi, Tanaka, Takeshi, Kataura, Hiromichi, Imahori, Hiroshi, Murakami, Tatsuya

“…Semiconducting single-walled carbon nanotubes (s-SWNTs) are capable of fluorescence emission as well as photothermal and photodynamic actions, resulting from…”
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Formation and Photodynamic Behavior of Transition Metal Dichalcogenide Nanosheet–Fullerene Inorganic/Organic Nanohybrids on Semiconducting Electrodes by Baek, Jinseok, Umeyama, Tomokazu, Choi, Wookjin, Tsutsui, Yusuke, Yamada, Hiroki, Seki, Shu, Imahori, Hiroshi

“…Composite films that consisted of C60 and well‐exfoliated nanosheets of transition metal dichalcogenides (TMDs), such as MoS2 or WS2, with a bulk…”
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Effects of Porphyrin Substituents and Adsorption Conditions on Photovoltaic Properties of Porphyrin-Sensitized TiO2 Cells by Imahori, Hiroshi, Hayashi, Shinya, Hayashi, Hironobu, Oguro, Akane, Eu, Seunghun, Umeyama, Tomokazu, Matano, Yoshihiro

“…A series of meso-tetraphenylzincporphyrins have been prepared to examine the effects of the porphyrin substituents and adsorption conditions on photovoltaic…”
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Electron-rich Five-membered Ring of Azulene as a Donor Unit in Donor–Acceptor Alternating Copolymers for Polymer Solar Cell Applications by Umeyama, Tomokazu, Watanabe, Yusuke, Miyata, Tetsushi, Imahori, Hiroshi

“…Novel donor–acceptor alternating polymers containing an electron-rich five-membered ring in azulene as a donor unit and diketopyrrolopyrrole or…”
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Quinoxaline-Fused Porphyrins for Dye-Sensitized Solar Cells by Eu, Seunghun, Hayashi, Shinya, Umeyama, Tomokazu, Matano, Yoshihiro, Araki, Yasuyuki, Imahori, Hiroshi

“…5,10,15,20-Tetrakis(2,4,6-trimethylphenyl)-6‘-carboxyquinoxalino[2,3-β]porphyrinatozinc (II) (ZnQMA) and…”
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Unraveling complex performance-limiting factors of brominated ITIC derivative: PM6 organic solar cells by using time-resolved measurements by Li, Shaoxian, Nishikubo, Ryosuke, Wada, Tatsuho, Umeyama, Tomokazu, Imahori, Hiroshi, Saeki, Akinori

“…Organic solar cells (OSCs) composed of a polymer and nonfullerene acceptor (NFA) have achieved dramatic improvements in power conversion efficiency (PCE),…”
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Effects of meso-Diarylamino Group of Porphyrins as Sensitizers in Dye-Sensitized Solar Cells on Optical, Electrochemical, and Photovoltaic Properties by Imahori, Hiroshi, Matsubara, Yusuke, Iijima, Hiroaki, Umeyama, Tomokazu, Matano, Yoshihiro, Ito, Seigo, Niemi, Marja, Tkachenko, Nikolai V, Lemmetyinen, Helge

“…We have prepared meso-bis(diarylamino)-substituted porphyrins (cis-ZnP and trans-ZnP), meso-diarylamino-substituted porphyrin (mono-ZnP), and porphyrin…”
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Efficient light-harvesting, energy migration, and charge transfer by nanographene-based nonfullerene small-molecule acceptors exhibiting unusually long excited-state lifetime in the film state by Umeyama, Tomokazu, Igarashi, Kensho, Sasada, Daiki, Tamai, Yasunari, Ishida, Keiichi, Koganezawa, Tomoyuki, Ohtani, Shunsuke, Tanaka, Kazuo, Ohkita, Hideo, Imahori, Hiroshi

“…Electron-acceptor small-molecules possessing a long exciton lifetime and a narrow energy band gap, opposing the energy gap law, are highly desirable for…”
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Synthesis and Isolation of cis-2 Regiospecific Ethylene-Tethered Indene Dimer–[70]Fullerene Adduct for Polymer Solar Cell Applications by Tao, Ran, Umeyama, Tomokazu, Higashino, Tomohiro, Koganezawa, Tomoyuki, Imahori, Hiroshi

“…Although the utilization of [70]­fullerene bis-adducts can enhance the power conversion efficiencies of polymer solar cells (PSCs) owing to their strong…”
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Supramolecular Donor−Acceptor Heterojunctions by Vectorial Stepwise Assembly of Porphyrins and Coordination-Bonded Fullerene Arrays for Photocurrent Generation by Kira, Aiko, Umeyama, Tomokazu, Matano, Yoshihiro, Yoshida, Kaname, Isoda, Seiji, Park, Jong Kang, Kim, Dongho, Imahori, Hiroshi

“…A novel strategy for constructing a vertical arrangement of bicontinuous donor−acceptor arrays on a semiconducting electrode has been developed. The…”
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