Daisuke Okumura

Multi‐turn time‐of‐flight mass spectrometers with electrostatic sectors

Michisato Toyoda, Daisuke Okumura, Morio Ishihara et al. · Journal of Mass Spectrometry · 2003 · 105 citations

Engineering, Analytical Instrumentation, Physics +14

Fabrication of graded band-gap Cu(InGa)Se2 thin-film mini-modules with a Zn(O,S,OH)x buffer layer

Katsumi Kushiya, M. Tachiyuki, T. Kase et al. · Solar Energy Materials and Solar Cells · 1997 · 69 citations

Materials Science, Ii-vi Semiconductor, Electrical Engineering +10

Performance improvement of CIGS-based modules by depositing high-quality Ga-doped ZnO windows with magnetron sputtering

Baosheng Sang, Katsumi Kushiya, Daisuke Okumura et al. · Solar Energy Materials and Solar Cells · 2001 · 57 citations

Materials Engineering, High-quality Ga-doped Zno, Electrical Engineering +7

Optimization of Al-doped ZnO Window Layers for Large-Area Cu(InGa)Se₂-Based Modules by RF/DC/DC Multiple Magnetron Sputtering

Nawalage F. Cooray, Katsumi Kushiya, Atsushi Fujimaki et al. · Japanese Journal of Applied Physics · 1999 · 51 citations

Aluminium Nitride, Thin Film Physics, Engineering +16

Large area ZnO films optimized for graded band-gap Cu(InGa)Se2-based thin-film mini-modules

Nawalage F. Cooray, Katsumi Kushiya, Atsushi Fujimaki et al. · Solar Energy Materials and Solar Cells · 1997 · 45 citations

Materials Engineering, Materials Science, Ii-vi Semiconductor +9