Abstract: A substrate processing apparatus configured to process a combined substrate in which a first substrate and a second substrate are stacked on top of each other includes a substrate holder configured to hold the combined substrate; a laser radiating unit configured to radiate laser light to a laser absorbing film in a pulse shape; a moving mechanism configured to move the substrate holder and the laser radiating unit relative to each other; and a controller configured to control the laser radiating unit and the moving mechanism. The controller performs, based on a thickness of the laser absorbing film, a control of selecting a position of a separation surface between the first substrate and the second substrate from one of a position between the first substrate and the laser absorbing film or a position between the a separation facilitating film and the second substrate.

Abstract: A substrate processing apparatus configured to process a combined substrate in which a first substrate, an interface layer including at least a laser absorbing film, and a second substrate are stacked on top of each other includes a substrate holder configured to hold the combined substrate; an interface laser radiating unit configured to radiate laser light to the laser absorbing film in a pulse shape; a moving mechanism configured to move the substrate holder and the interface laser radiating unit relative to each other; and a controller. The controller performs a control of acquiring information of the interface layer formed in the combined substrate, and a control of setting, based on the acquired information of the interface layer, a bonding interface having a weakest adhesive strength among bonding interfaces in the interface layer as a separation interface between the first substrate and the second substrate.

Abstract: 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.

Abstract: 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.