Photoelectric conversion element and solid-state imaging device

A solid-state imaging device provided with pixels each including one or more organic photoelectric converters, each of the organic photoelectric converters comprising:

• a first electrode and a second electrode facing each other;
• and
• a photoelectric conversion layer provided between the first electrode and the second electrode, and including a first organic semiconductor material, a second organic semiconductor material, and a third organic semiconductor material that have mother skeletons different from one another,
• the first organic semiconductor material being one of fullerenes and fullerene derivatives,
• the second organic semiconductor material in a form of a single-layer film having a higher linear absorption coefficient of a maximal light absorption wavelength in a visible light region than a single-layer film of the first organic semiconductor material and a single-layer film of the third organic semiconductor material, and
• the third organic semiconductor material in a form of a single-layer film having higher mobility than hole mobility of the single-layer film of the second organic semiconductor material.