Organic photoelectronic device and image sensor

An organic photoelectronic device, comprising:

• a light-receiving electrode and an opposing electrode,
• a light-absorption layer between the light-receiving electrode and the opposing electrode, and
• a light-absorption auxiliary layer between the light-receiving electrode and the opposing electrode,
• wherein the light-absorption auxiliary layer includes a light-absorption material configured to absorb light in a visible wavelength region.

An organic photoelectronic device, comprising:

• a first electrode and a second electrode facing each other;
• a light-absorption layer between the first electrode and the second electrode, the light-absorption layer including a first p-type light-absorption material and a first n-type light-absorption material, the first p-type light-absorption material and the first n-type light-absorption material forming a heterojunction, and
• a light-absorption auxiliary layer on one side of the light-absorption layer,
• wherein a FWHM of the light-absorption auxiliary layer is narrower than a FWHM of the light-absorption layer.