Photoelectric conversion element, imaging device, and optical sensor

An imaging device, comprising:

• a photoelectric conversion element, wherein the photoelectric conversion element comprises:
• a first electrode;
• a second electrode;
• and
• an organic photoelectric conversion portion between the first electrode and the second electrode, wherein
• the organic photoelectric conversion portion includes at least a first organic semiconductor layer and a second organic semiconductor layer,
• the first organic semiconductor layer comprises a first organic semiconductor material,
• the second organic semiconductor layer comprises a second organic semiconductor material,
• the first organic semiconductor material is different from the second organic semiconductor material,
• the first organic semiconductor material has a first wavelength sensitivity and the second organic semiconductor material has a second wavelength sensitivity, and
• wavelength sensitivity characteristics of the organic photoelectric conversion portion changes based on a voltage applied between the first electrode and the second electrode.

An optical sensor, comprising:

• a photoelectric conversion element, wherein the photoelectric conversion element comprises:
• a first electrode;
• a second electrode;
• and
• an organic photoelectric conversion portion between the first electrode and the second electrode, wherein
• the organic photoelectric conversion portion includes a first organic semiconductor layer and a second organic semiconductor layer,
• the first organic semiconductor layer comprises a first organic semiconductor material,
• the second organic semiconductor layer comprises a second organic semiconductor material,
• the first organic semiconductor material is different from the second organic semiconductor material,
• the first organic semiconductor material has a first wavelength sensitivity and the second organic semiconductor material has a second wavelength sensitivity,
• wavelength sensitivity characteristics of the organic photoelectric conversion portion changes based on a voltage applied between the first electrode and the second electrode, and
• a detection wavelength region of the optical sensor changes based on the voltage applied between the first electrode and the second electrode.