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Highly accurate prediction of material optical properties based on density functional theory
Mitsutoshi Nishiwaki, Hiroyuki Fujiwara
Theoretical material investigation based on density functional theory (DFT) has been a breakthrough in the last century. Nevertheless, the optical properties calculated by DFT gene…
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…
Maximum efficiencies and performance limiting factors of inorganic and hybrid perovskite solar cells
Yoshitsune Kato, Shohei Fujimoto, Masayuki Kozawa +1
The Shockley and Queisser limit, a well-known efficiency limit for a solar cell, is based on unrealistic physical assumptions and its maximum limit is seriously overestimated. To u…