Masayoshi Umeno

Overview

Best Publications

• Efficient Solar Water Splitting, Exemplified by RuO2-Catalyzed AlGaAs/Si Photoelectrolysis

  S. Licht;and B. Wang;S. Mukerji;T. Soga and

  504
  Citations

• Optical properties of wurtzite structure GaN on sapphire around fundamental absorption edge (0.78–4.77 eV) by spectroscopic ellipsometry and the optical transmission method

  G. Yu;G. Wang;H. Ishikawa;Masayoshi Umeno

  386
  Citations

• GaN on Si Substrate with AlGaN/AlN Intermediate Layer

  Hiroyasu Ishikawa;Guang Yuan Zhao;Naoyuki Nakada;Takashi Egawa

  273
  Citations

• Optical properties and X-ray photoelectron spectroscopic study of pure and Pb-doped TiO2 thin films

  M.M. Rahman;K.M. Krishna;T. Soga;T. Jimbo

  267
  Citations

• Investigations of SiO2/n-GaN and Si3N4/n-GaN insulator–semiconductor interfaces with low interface state density

  S. Arulkumaran;T. Egawa;H. Ishikawa;T. Jimbo

  263
  Citations

• Over 18% solar energy conversion to generation of hydrogen fuel; theory and experiment for efficient solar water splitting

  S Licht;B Wang;S Mukerji;T Soga

  255
  Citations

• Thermal stability of GaN on (111)Si substrate

  Hiroyasu Ishikawa;Kensaku Yamamoto;Takashi Egawa;Tetsuo Soga

  243
  Citations

• Method of making an epitaxial gallium arsenide semiconductor wafer using a strained layer superlattice

  Masayoshi Umeno;Shiro Sakai;Shinichiro Yahagi

  158
  Citations

• Improved characteristics of InGaN multiple-quantum-well light-emitting diode by GaN/AlGaN distributed Bragg reflector grown on sapphire

  N. Nakada;M. Nakaji;Hiroyasu Ishikawa;T. Egawa

  149
  Citations

• Structural and optical properties of diamond and nano-diamond films grown by microwave plasma chemical vapor deposition

  T. Sharda;M.M. Rahaman;Y. Nukaya;T. Soga

  145
  Citations

• Characterization of epitaxially grown GaAs on Si substrates with III‐V compounds intermediate layers by metalorganic chemical vapor deposition

  Tetsuo Soga;Shuzo Hattori;Shiro Sakai;Masanari Takeyasu

  138
  Citations

• Spectroscopic properties of nitrogen doped hydrogenated amorphous carbon films grown by radio frequency plasma-enhanced chemical vapor deposition

  Y. Hayashi;G. Yu;M. M. Rahman;K. M. Krishna

  127
  Citations

• Room-temperature laser operation of AlGaAs/GaAs double heterostructures fabricated on Si substrates by metalorganic chemical vapor deposition

  Shiro Sakai;Tetsuo Soga;Masanari Takeyasu;Masayoshi Umeno

  121
  Citations

• Carbon nanotubes by spray pyrolysis of turpentine oil at different temperatures and their studies

  Rakesh A. Afre;T. Soga;T. Jimbo;Mukul Kumar

  121
  Citations

• Recessed gate AlGaN/GaN modulation-doped field-effect transistors on sapphire

  T. Egawa;Hiroyasu Ishikawa;M. Umeno;T. Jimbo

  120
  Citations

• Optical Absorption and Electrical Conductivity of Amorphous Carbon Thin Films from Camphor: A Natural Source

  Sharif Md. Mominuzzaman;Kalaga Murali Krishna;Tetsuo Soga;Takashi Jimbo

  119
  Citations

• MOCVD growth of GaAs on Si substrates with AlGaP and strained superlattice layers

  T. Soga;S. Hattori;S. Sakai;M. Takeyasu

  118
  Citations

• Photovoltaic and spectral photoresponse characteristics of n-C/p-C solar cell on a p-silicon substrate

  K. M. Krishna;Masayoshi Umeno;Y. Nukaya;Tetsuo Soga

  116
  Citations

• High-Quality GaN on Si Substrate Using AlGaN/AlN Intermediate Layer

  H. Ishikawa;G. Y. Zhao;N. Nakada;T. Egawa

  115
  Citations

• Raman spectra of ion beam sputtered amorphous carbon thin films deposited from camphoric carbon

  Sharif Mohammad Mominuzzaman;Kalaga Murali Krishna;Tetsuo Soga;Takashi Jimbo

  111
  Citations