Kao Corporation

Takuya Sawada

Toshihiro Yano

Hiroji Hosokawa

Yohei Shiraishi

Akinori Okonogi

The present invention pertains to a light absorption layer for forming a solar cell and a photoelectric conversion element having excellent durability and photoelectric conversion efficiency in the near infrared region, and a solar cell and a photoelectric conversion element having the light absorption layer. This light absorption layer contains a perovskite compound having a band gap energy of 1.7-4.0 eV, and a quantum dot having a band gap energy equal to or higher than 0.2 eV and equal to or lower than the band gap energy of the perovskite compound.

Light absorption layer, dispersion, photoelectric conversion element, solar cell, and method for manufacturing light absorption layer

The present invention relates to (1) hollow silica particles including an outer shell portion having a mesoporous structure with an average pore size of from 1 to 10 nm, wherein the silica particles have an average particle diameter of from 0.05 to 10 &#x3bc;m, and 80% or more of the whole silica particles have a particle diameter falling within the range of &#xb1;30% of the average particle diameter; (2) composite silica particles including silica particles which include an outer shell portion having a mesoporous structure with an average pore size of from 1 to 10 nm, and have a BET specific surface area of 100 m/g or more, and a hydrophobic organic compound or a polymeric organic compound incorporated inside of the silica particles; and a process for producing the hollow silica particles.

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Wakayama, Japan

Takuya Sawada