403 citations · 825 across the 5 of their papers we have counts for
5 papers
Giant oscillator strength in the band-edge light absorption of zincblende, chalcopyrite and kesterite solar cell materials
Masato Kato, Mitsutoshi Nishiwaki, Hiroyuki Fujiwara
In semiconducting solar-cell absorbers, high absorption coefficient (alpha) near the band-edge region is critical to maximize the photocurrent generation and collection. Neverthele…
Tail state formation in solar cell materials: First principles analyses of zincblende, chalcopyrite, kesterite and hybrid perovskite crystals
Mitsutoshi Nishiwaki, Keisuke Nagaya, Masato Kato +6
Tail state formation in solar cell absorbers leads to a detrimental effect on solar cell performance. Nevertheless, the characterization of the band tailing in experimental semicon…
Universal rules for visible-light absorption in hybrid perovskite materials
Masato Kato, Takemasa Fujiseki, Tetsuhiko Miyadera +5
A variety of organic-inorganic hybrid perovskites (APbX3) consisting of mixed center cations [A = CH3NH3+, HC(NH2)2+, Cs+] with different PbX3- cages (X = I, Br, Cl) have been deve…
Degradation mechanism of CH3NH3PbI3 perovskite materials upon exposure to humid air
Masaki Shirayama, Masato Kato, Tetsuhiko Miyadera +7
Low stability of organic-inorganic perovskite (CH3NH3PbI3) solar cells in humid air environments is a serious drawback which could limit practical application of this material seve…
Optical transitions in hybrid perovskite solar cells: Ellipsometry, density functional theory, and quantum efficiency analyses for CH3NH3PbI3
Masaki Shirayama, Hideyuki Kadowaki, Tetsuhiko Miyadera +10
We report artifact-free CH3NH3PbI3 optical constants extracted from ultra-smooth perovskite layers without air exposure and assign all the optical transitions in the visible/ultrav…