Masayoshi Umeno

Best Publications

• Planer nano-graphenes from camphor by CVD

  Prakash R. Somani;Savita P. Somani;Masayoshi Umeno

  685
  Citations

• GaN on Si Substrate with AlGaN/AlN Intermediate Layer

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

  273
  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

• Low temperature growth of graphene film by microwave assisted surface wave plasma CVD for transparent electrode application

  Golap Kalita;Koichi Wakita;Masayoshi Umeno

  110
  Citations

• Graphene constructed carbon thin films as transparent electrodes for solar cell applications

  Golap Kalita;Masahiro Matsushima;Hideo Uchida;Koichi Wakita

  101
  Citations

• Femtosecond laser induced micropatterning of graphene film

  Golap Kalita;Litao Qi;Yoshiharu Namba;Koichi Wakita

  100
  Citations

• Diamond-like carbon thin films by microwave surface-wave plasma CVD aimed for the application of photovoltaic solar cells

  Masayoshi Umeno;Sunil Adhikary

  95
  Citations

• Determination of optical constants of solgel-derived inhomogeneous TiO 2 thin films by spectroscopic ellipsometry and transmission spectroscopy

  Md. Mosaddeq-ur-Rahman;Guolin Yu;Kalaga Murali Krishna;Tetsuo Soga

  94
  Citations

• Epitaxial growth and material properties of GaAs on Si grown by MOCVD

  Tetsuo Soga;Shuzo Hattori;Shiro Sakai;Masayoshi Umeno

  94
  Citations

• Silicon nanowire array/polymer hybrid solar cell incorporating carbon nanotubes

  Golap Kalita;Sudip Adhikari;Hare Ram Aryal;Rakesh Afre

  85
  Citations

• Toward organic thick film solar cells: Three dimensional bulk heterojunction organic thick film solar cell using fullerene single crystal nanorods

  Prakash R. Somani;Savita P. Somani;Masayoshi Umeno

  85
  Citations

• Photovoltaic characteristics of boron-doped hydrogenated amorphous carbon on n-Si substrate prepared by r.f. plasma-enhanced CVD using trimethylboron

  Y. Hayashi;S. Ishikawa;T. Soga;M. Umeno

  82
  Citations

• FEW LAYERS OF GRAPHENE AS TRANSPARENT ELECTRODE FROM BOTANICAL DERIVATIVE CAMPHOR

  Golap Kalita;Matsushima Masahiro;Hideo Uchida;Koichi Wakita

  80
  Citations

• Realization of GaAs/AlGaAs Lasers on Si Substrates Using Epitaxial Lateral Overgrowth by Metalorganic Chemical Vapor Deposition

  Zaman Iqbal Kazi;Periyasamy Thilakan;Takashi Egawa;Masayoshi Umeno

  79
  Citations

• Selective MOCVD growth of GaAlAs on partly masked substrates and its application to optoelectronic devices

  Yasuhito Takahashi;Shiro Sakai;Masayoshi Umeno

  74
  Citations

• Direct evidence for self‐annihilation of antiphase domains in GaAs/Si heterostructures

  O. Ueda;Tetsuo Soga;Takashi Jimbo;Masayoshi Umeno

  73
  Citations

• Determination of exciton transition energy and bowing parameter of AlGaN alloys in AlGaN/GaN heterostructure by means of reflectance measurement

  H. Jiang;G. Y. Zhao;H. Ishikawa;Takashi Egawa

  72
  Citations

• AlGaAs/GaAs DH Lasers on Si Substrates Grown Using Super Lattice Buffer Layers by MOCVD

  Shiro Sakai;Tetsuo Soga;Masanari Takeyasu;Masayoshi Umeno

  72
  Citations

• Characterization of Phosphorus-Doped Amorphous Carbon and Construction of n-Carbon/p-Silicon Heterojunction Solar Cells

  Mohamad Rusop;Shariff M. Mominuzzaman;Tetsuo Soga;Takashi Jimbo

  70
  Citations

• Improving photovoltaic properties by incorporating both single walled carbon nanotubes and functionalized multiwalled carbon nanotubes

  Ishwor Khatri;Sudip Adhikari;Hare Ram Aryal;Tetsuo Soga

  70
  Citations

• Fullerene (C60) decoration in oxygen plasma treated multiwalled carbon nanotubes for photovoltaic application

  Golap Kalita;Sudip Adhikari;Hare Ram Aryal;Masayoshi Umeno

  69
  Citations

• Growth of high-quality GaN films on epitaxial AlN/sapphire templates by MOVPE

  Masahiro Sakai;Hiroyasu Ishikawa;Takashi Egawa;Takashi Jimbo

  69
  Citations

• Improving photovoltaic response of poly(3-hexylthiophene)/n-Si heterojunction by incorporating double walled carbon nanotubes

  Savita P. Somani;Prakash R. Somani;Masayoshi Umeno;Emmanuel Flahaut

  66
  Citations

• Effects of Dislocation and Stress on Characteristics of GaAs-Based Laser Grown on Si by Metalorganic Chemical Vapor Deposition

  Takashi Egawa;Yoshiaki Hasegawa;Takashi Jimbo;Masayoshi Umeno

  66
  Citations