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T. Umeyama · SciRah

Researcher profile · Semantic Scholar

T. Umeyama

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T. Umeyama — researcher profile on SciRah

h-index: 45
Works: 224
Citations: 7,213

Most-cited papers

Self-assembling porphyrins and phthalocyanines for photoinduced charge separation and charge transport.
H. Imahori, T. Umeyama, Kei Kurotobi, Yuta Takano
2012Chemical Communications175 citations
Semantic Scholar
Isomer Effects of Fullerene Derivatives on Organic Photovoltaics and Perovskite Solar Cells.
T. Umeyama, H. Imahori
2019Accounts of Chemical Research126 citations
Semantic Scholar
Photothermal ablation of tumor cells using a single-walled carbon nanotube-peptide composite.
Y. Hashida, Hironori Tanaka, Shuwen Zhou, S. Kawakami +5 more
2014Journal of Controlled Release107 citations Open access
Semantic Scholar
Photofunctional Hybrid Nanocarbon Materials
T. Umeyama, H. Imahori
2013103 citations
Semantic Scholar
An efficient electron transport material of tin oxide for planar structure perovskite solar cells
G. Murugadoss, Hiroyuki Kanda, Soichiro Tanaka, H. Nishino +3 more
201687 citations Open access
Semantic Scholar
Lead-free perovskite solar cells using Sb and Bi-based A3B2X9 and A3BX6 crystals with normal and inverse cell structures
A. Baranwal, Hideaki Masutani, Hidetaka Sugita, Hiroyuki Kanda +10 more
2017Nano Convergence78 citations Open access
Semantic Scholar
Analysis of Sputtering Damage on I–V Curves for Perovskite Solar Cells and Simulation with Reversed Diode Model
Hiroyuki Kanda, A. Uzum, A. Baranwal, T. A. Nirmal Peiris +5 more
201674 citations
Semantic Scholar
Design and control of organic semiconductors and their nanostructures for polymer–fullerene-based photovoltaic devices
T. Umeyama, H. Imahori
201464 citations
Semantic Scholar
Effects of dihydronaphthyl-based [60]fullerene bisadduct regioisomers on polymer solar cell performance.
S. Kitaura, Kei Kurotobi, Maki Sato, Yuta Takano +2 more
2012Chemical Communications63 citations
Semantic Scholar
Effective role of eco-friendly acetyl tributyl citrate in large-scale catalyst-free synthesis of waterborne polyurethanes without volatile organic compounds
Xin-Gui Li, Yun-Bin Xie, Mei-Rong Huang, T. Umeyama +2 more
2019Journal of Cleaner Production58 citations
Semantic Scholar
Preparation and photophysical and photoelectrochemical properties of a covalently fixed porphyrin-chemically converted graphene composite.
T. Umeyama, J. Mihara, Noriyasu Tezuka, Y. Matano +11 more
2012Chemistry57 citations
Semantic Scholar
Double functions of porous TiO2 electrodes on CH3NH3PbI3 perovskite solar cells: Enhancement of perovskite crystal transformation and prohibition of short circuiting
G. Murugadoss, G. Mizuta, Soichiro Tanaka, H. Nishino +3 more
201456 citations Open access
Semantic Scholar
Effect of Fluorine Substitution on Photovoltaic Properties of Benzothiadiazole–Carbazole Alternating Copolymers
T. Umeyama, Yusuke Watanabe, Evgenia Douvogianni, H. Imahori
201356 citations
Semantic Scholar
Light stability tests of methylammonium and formamidinium Pb-halide perovskites for solar cell applications
G. Murugadoss, Soichiro Tanaka, G. Mizuta, Shusaku Kanaya +4 more
201555 citations Open access
Semantic Scholar
Geometries, Electronic Couplings, and Hole Dissociation Dynamics of Photoinduced Electron-Hole Pairs in Polyhexylthiophene-Fullerene Dyads Rigidly Linked by Oligophenylenes.
Taku Miura, R. Tao, Sho Shibata, T. Umeyama +3 more
2016Journal of the American Chemical Society51 citations
Semantic Scholar
Effect of Silicon Surface for Perovskite/Silicon Tandem Solar Cells: Flat or Textured?
Hiroyuki Kanda, Naoyuki Shibayama, A. Uzum, T. Umeyama +3 more
2018ACS Applied Materials and Interfaces49 citations Open access
Semantic Scholar
Effects of alkyl chain length and substituent pattern of fullerene bis-adducts on film structures and photovoltaic properties of bulk heterojunction solar cells.
R. Tao, T. Umeyama, Kei Kurotobi, H. Imahori
2014ACS Applied Materials and Interfaces49 citations
Semantic Scholar
Phosphole‐ and Benzodithiophene‐Based Copolymers: Synthesis and Application in Organic Photovoltaics
Y. Matano, H. Ohkubo, T. Miyata, Yusuke Watanabe +3 more
201440 citations
Semantic Scholar
Interface Optoelectronics Engineering for Mechanically Stacked Tandem Solar Cells Based on Perovskite and Silicon.
Hiroyuki Kanda, A. Uzum, H. Nishino, T. Umeyama +4 more
2016ACS Applied Materials and Interfaces38 citations
Semantic Scholar
Boosting of the Performance of Perovskite Solar Cells through Systematic Introduction of Reduced Graphene Oxide in TiO2 Layers
T. Umeyama, Daichi Matano, Jinseok Baek, Satyajit Gupta +3 more
201536 citations
Semantic Scholar
Molecular interactions on single-walled carbon nanotubes revealed by high-resolution transmission microscopy
T. Umeyama, Jinseok Baek, Yuta Sato, K. Suenaga +4 more
2015Nature Communications35 citations Open access
Semantic Scholar
Polymer-Assisted Construction of Mesoporous TiO2 Layers for Improving Perovskite Solar Cell Performance
Youfeng Yue, T. Umeyama, Y. Kohara, Hitoshi Kashio +4 more
201534 citations
Semantic Scholar
Regioisomer effects of [70]fullerene mono-adduct acceptors in bulk heterojunction polymer solar cells
T. Umeyama, T. Miyata, Andreas C. Jakowetz, Sho Shibata +9 more
2016Chemical Science33 citations Open access
Semantic Scholar
Highly cost-efficient sorption and desorption of mercury ions onto regenerable poly(m-phenylenediamine) microspheres with many active groups
Xin-Gui Li, Mei-Rong Huang, T. Tao, Zhong-Hua Ren +5 more
202032 citations
Semantic Scholar
Unique Tube-Ring Interactions: Complexation of Single-Walled Carbon Nanotubes with Cycloparaphenyleneacetylenes.
K. Miki, K. Saiki, T. Umeyama, Jinseok Baek +5 more
2018Small31 citations Open access
Semantic Scholar
Development of clean performance-tunable waterborne polyurethane using acetyl tributyl citrate for transferable holographic films
Xin-Gui Li, Yun-Bin Xie, Mei-Rong Huang, T. Umeyama +1 more
202129 citations
Semantic Scholar
A single cis-2 regioisomer of ethylene-tethered indene dimer-fullerene adduct as an electron-acceptor in polymer solar cells.
R. Tao, T. Umeyama, T. Higashino, T. Koganezawa +1 more
2015Chemical Communications29 citations
Semantic Scholar
Electron-Rich Five Membered Ring of Azulene as a Donor Unit in Donor–Acceptor Alternating Copolymers for Polymer Solar Cell Applications
T. Umeyama, Yusuke Watanabe, T. Miyata, H. Imahori
201527 citations
Semantic Scholar
Synthesis and Isolation of cis-2 Regiospecific Ethylene-Tethered Indene Dimer-[70]Fullerene Adduct for Polymer Solar Cell Applications.
R. Tao, T. Umeyama, T. Higashino, T. Koganezawa +1 more
2015ACS Applied Materials and Interfaces27 citations
Semantic Scholar
Cleaner synthesis and systematical characterization of sustainable poly(isosorbide-co-ethylene terephthalate) by environ-benign and highly active catalysts
Xin-Gui Li, Ge Song, Mei-Rong Huang, T. Ohara +4 more
2019Journal of Cleaner Production25 citations
Semantic Scholar
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
T. Umeyama, Kensho Igarashi, Daiki Sasada, Yasunari Tamai +6 more
2020Chemical Science24 citations Open access
Semantic Scholar
Preparation of immunostimulatory single-walled carbon nanotube/CpG DNA complexes and evaluation of their potential in cancer immunotherapy.
Shuwen Zhou, Y. Hashida, S. Kawakami, J. Mihara +5 more
2014International journal of pharmaceutics23 citations Open access
Semantic Scholar
Facile fabrication method of small-sized crystal silicon solar cells for ubiquitous applications and tandem device with perovskite solar cells
Hiroyuki Kanda, Naoyuki Shibayama, A. Uzum, T. Umeyama +5 more
201721 citations Open access
Semantic Scholar
Long-Range Interfacial Charge Carrier Trapping in Halide Perovskite-C60 and Halide Perovskite-TiO2 Donor-Acceptor Films.
B. M. Sachith, T. Okamoto, Sushant Ghimire, T. Umeyama +3 more
2021Journal of Physical Chemistry Letters20 citations
Semantic Scholar
Formation and Photodynamic Behavior of Transition Metal Dichalcogenide Nanosheet-Fullerene Inorganic/Organic Nanohybrids on Semiconducting Electrodes.
Jinseok Baek, T. Umeyama, Wookjin Choi, Yusuke Tsutsui +3 more
2017Chemistry20 citations Open access
Semantic Scholar
Unique cohesive nature of the β1-isomer of [70]PCBM fullerene on structures and photovoltaic performances of bulk heterojunction films with PffBT4T-2OD polymers.
T. Umeyama, Kensho Igarashi, D. Sakamaki, S. Seki +1 more
2018Chemical Communications19 citations
Semantic Scholar
Incorporation of Graphene to Fullerene Clusters and Fullerene-Nanotube Composites and Their Photoelectrochemical Properties
T. Umeyama, Jinseok Baek, Noriyasu Tezuka, Kazuki Morita +1 more
201318 citations Open access
Semantic Scholar
Electron transfer and exciplex chemistry of functionalized nanocarbons: effects of electronic coupling and donor dimerization.
T. Umeyama, H. Imahori
2018Nanoscale Horizons17 citations Open access
Semantic Scholar
Material Exchange Property of Organo Lead Halide Perovskite with Hole-Transporting Materials
S. Ito, Shusaku Kanaya, H. Nishino, T. Umeyama +1 more
201517 citations Open access
Semantic Scholar
Effect of carbazochrome sodium sulfonate on refractory chronic prostatitis
H. Oh-oka, Tetsuo Yamada, H. Noto, T. Umeyama +4 more
2014International journal of urology17 citations
Semantic Scholar
Synthesis of low bandgap polymers based on thienoquinodimethane units and their applications in bulk heterojunction solar cells
T. Umeyama, Yusuke Watanabe, Masaaki Oodoi, Douvogianni Evgenia +2 more
201217 citations
Semantic Scholar
Sustained photodynamic effect of single chirality-enriched single-walled carbon nanotubes
Ryosuke Fukuda, T. Umeyama, M. Tsujimoto, Fumiyoshi Ishidate +4 more
202016 citations Open access
Semantic Scholar
Conjugated donor–acceptor (D–A) copolymers in inverted organic solar cells – a combined experimental and modelling study
V. Manninen, M. Niskanen, T. Hukka, Felix M. Pasker +6 more
201316 citations
Semantic Scholar
A chemical approach to perovskite solar cells: control of electron-transporting mesoporous TiO2 and utilization of nanocarbon materials.
T. Umeyama, H. Imahori
2017Dalton Transactions15 citations
Semantic Scholar
Remarkable Dependence of Exciplex Decay Rate on Through-Space Separation Distance between Porphyrin and Chemically Converted Graphene
T. Umeyama, Takuma Hanaoka, Jinseok Baek, T. Higashino +3 more
201615 citations
Semantic Scholar
Efficient Exciton Diffusion in Micrometer-Sized Domains of Nanographene-Based Nonfullerene Acceptors with Long Exciton Lifetimes in Blend Films with Conjugated Polymer.
T. Umeyama, Kensho Igarashi, Daiki Sasada, Keiichi Ishida +4 more
2020ACS Applied Materials and Interfaces14 citations
Semantic Scholar
Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes
T. Umeyama, Takuma Hanaoka, H. Yamada, Y. Namura +8 more
2019Chemical Science13 citations Open access
Semantic Scholar
Synthesis and Photovoltaic Properties of Conjugated Polymer Based on 1,3,4-Thiadiazole Unit
T. Umeyama, Evgenia Douvogianni, H. Imahori
201213 citations
Semantic Scholar
Thermal Precursor Approach to Pristine Fullerene Film as Electron Selective Layer in Perovskite Solar Cells
T. Umeyama, Daichi Matano, Sho Shibata, Jinseok Baek +2 more
201712 citations Open access
Semantic Scholar
Photodynamic and Photoelectrochemical Properties of Few-Layered Bismuthene Film on SnO2 Electrode and Its Hybridization with C60
T. Umeyama, Hang Xu, T. Ohara, Yusuke Tsutsui +2 more
2021Journal of Physical Chemistry C11 citations
Semantic Scholar

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