140 citations · 284 across the 8 of their papers we have counts for
8 papers
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…
Quantitative determination of optical and recombination losses in thin-film photovoltaic devices based on external quantum efficiency analysis
Akihiro Nakane, Hitoshi Tampo, Masato Tamakoshi +6
In developing photovoltaic devices with high efficiencies, quantitative determination of the carrier loss is crucial. In conventional solar-cell characterization techniques, howeve…
C-axis critical current of a PrFeAsO0.7 single crystal
H. Kashiwaya, K. Shirai, T. Matsumoto +8
The c-axis transport properties of a high-pressure synthesized PrFeAsO0.7 single crystal are studied using s-shaped junctions. Resistivity anisotropy of about 120 detected at 50 K…
Possible observation of energy level quantization in an intrinsic Josephson junction
H. Kashiwaya, T. Matsumoto, S. Kashiwaya +5
Energy level quantization (ELQ) is studied to clarify the macroscopic quantum dynamics of the d-wave Josephson junction (JJ). The influences of the nodal quasiparticles of d-wave s…
Switching Dynamics of BiSrCaCuO Intrinsic Josephson junctions: Macroscopic Quantum Tunneling and Self-Heating Effect
H. Kashiwaya, T. Matsumoto, H. Shibata +5
The switching dynamics of current-biased BiSrCaCuO intrinsic Josephson junctions (IJJs) was studied to clarify the effect of d-wave superconductivity and…
Optical properties of unconventional superconductors
Takashi Yanagisawa, Hajime Shibata
The optical conductivity measurements give a powerful tool to investigate the nature of the superconducting gap for conventional and unconventional superconductors. In this article…