Tokiyoshi Umeda - Concepedia

Author

Tokiyoshi Umeda

The University of Osaka

Also Known As

Tokiyoshi Umeda, Tokiyoshi Umeda Tokiyoshi Umeda

Publications

962

Citations

H-Index

Concepts

All Affiliations

The University of Osaka Tokyo Institute of Technology

About

Tokiyoshi Umeda is an author at The University of Osaka specializing in engineering, materials science, and electrical engineering.

Top Concepts

#	Concept	H-Index	Publications	Citations
1	Engineering	13	18	914
2	Applied Physics	10	11	750
3	Chemistry	10	11	504
4	Chemical Engineering	6	6	182
5	Natural Sciences	1	1	15

Tokiyoshi Umeda

Publications

924

Citations

H-Index

Page 1

	Year	Citations
Surface-energy-dependent field-effect mobilities up to 1 cm2/V s for polymer thin-film transistor Tokiyoshi Umeda, Daisuke Kumaki, Shizuo Tokito Journal of Applied Physics EngineeringSelf-assembled MonolayersSurface EnergiesLiquid Crystalline ElastomerChemistry	2009	170
Reducing the contact resistance of bottom-contact pentacene thin-film transistors by employing a MoOx carrier injection layer Daisuke Kumaki, Tokiyoshi Umeda, Shizuo Tokito Applied Physics Letters Materials ScienceElectrical EngineeringEngineeringOrganic ElectronicsNanoelectronics	2008	134
Influence of H2O and O2 on threshold voltage shift in organic thin-film transistors: Deprotonation of SiOH on SiO2 gate-insulator surface Daisuke Kumaki, Tokiyoshi Umeda, Shizuo Tokito Applied Physics Letters Electrical EngineeringElectronic DevicesEngineeringElectronic MaterialsOrganic Electronics	2008	97
High air stability of threshold voltage on gate bias stress in pentacene TFTs with a hydroxyl-free and amorphous fluoropolymer as gate insulators Tokiyoshi Umeda, Daisuke Kumaki, Shizuo Tokito Organic Electronics Materials ScienceConducting PolymerElectrical EngineeringPentacene TftsEngineering	2008	95
Significant improvement of electron mobility in organic thin-film transistors based on thiazolothiazole derivative by employing self-assembled monolayer Daisuke Kumaki, Shinji Ando, Satoshi Shimono, Applied Physics Letters EngineeringOrganic ElectronicsSignificant ImprovementChemistryChemical Engineering	2007	86
High-mobility and air-stable organic thin-film transistors with highly ordered semiconducting polymer films Tokiyoshi Umeda, Shizuo Tokito, Daisuke Kumaki Journal of Applied Physics EngineeringOrganic ElectronicsChemistryConducting PolymerNanoelectronics	2007	74
Effect of ZnO layer on characteristics of conducting polymer/C<sub>60</sub>photovoltaic cell Tomoki Shirakawa, Tokiyoshi Umeda, Yuuki Hashimoto, Journal of Physics D Applied Physics Optical MaterialsEngineeringStructure Indium–tin OxideOrganic ElectronicsOrganic Solar Cell	2004	65
Improvement of Characteristics of Organic Photovoltaic Devices Composed of Conducting Polymer-Fullerene Systems by Introduction of ZnO Layer Tokiyoshi Umeda, Tomoki Shirakawa, Akihiko Fujii, Japanese Journal of Applied Physics EngineeringOrganic ElectronicsOrganic Solar CellPolymer-fullerene SystemsPhotovoltaic Devices	2003	31
High-mobility bottom-contact thin-film transistor based on anthracene oligomer Daisuke Kumaki, Tokiyoshi Umeda, Toshiyasu Suzuki, Organic Electronics Materials ScienceEngineeringOrganic ElectronicsAnthracene OligomerApplied Physics	2008	30
Interpenetrating Interface in Organic Photovoltaic Cells with Heterojunction of Poly(3-hexylthiophene) and C<sub>60</sub> Akihiko Fujii, Tomoki Shirakawa, Tokiyoshi Umeda, Japanese Journal of Applied Physics Materials ScienceChemical EngineeringEngineeringSemiconducting PolymerC 60	2004	29

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