An image sensor comprising: a photoelectronic device, the photoelectric device comprising: a first electrode; a light-absorption layer on the first electrode and including a first p-type light-absorption material and a first n-type light-absorption material; a light-absorption auxiliary layer on the light- absorption layer and including a second p-type light-absorption material or a second n-type light-absorption material; a charge auxiliary layer on the light-absorption auxiliary layer; and a second electrode on the charge auxiliary layer, wherein the light-absorption layer and the light-absorption auxiliary layer are in contact with each other, the light-absorption layer and the light-absorption auxiliary layer are configured to selectively absorb light in a green wavelength region, characterized in that the second p-type light-absorption material or the second n-type light-absorption material has a smaller full width at half maximum (FWHM) than the light-absorption layer in the green wavelength region; the charge auxiliary layer is configured to allow holes and electrons separated in the light-absorption layer to transfer to the second electrode; the charge auxiliary layer is configured to not substantially absorb light in a visible wavelength region; wherein each of the first electrode and the second electrode is a light-transmitting electrode, and the second electrode is at a side from which light is incident. a photoelectronic device, the photoelectric device comprising: a first electrode; a light-absorption layer on the first electrode and including a first p-type light-absorption material and a first n-type light-absorption material; a light-absorption auxiliary layer on the light- absorption layer and including a second p-type light-absorption material or a second n-type light-absorption material; a charge auxiliary layer on the light-absorption auxiliary layer; and a second electrode on the charge auxiliary layer, wherein the light-absorption layer and the light-absorption auxiliary layer are in contact with each other, the light-absorption layer and the light-absorption auxiliary layer are configured to selectively absorb light in a green wavelength region, characterized in that the second p-type light-absorption material or the second n-type light-absorption material has a smaller full width at half maximum (FWHM) than the light-absorption layer in the green wavelength region; the charge auxiliary layer is configured to allow holes and electrons separated in the light-absorption layer to transfer to the second electrode; the charge auxiliary layer is configured to not substantially absorb light in a visible wavelength region; wherein each of the first electrode and the second electrode is a light-transmitting electrode, and the second electrode is at a side from which light is incident. a first electrode; a light-absorption layer on the first electrode and including a first p-type light-absorption material and a first n-type light-absorption material; a light-absorption auxiliary layer on the light- absorption layer and including a second p-type light-absorption material or a second n-type light-absorption material; a charge auxiliary layer on the light-absorption auxiliary layer; and a second electrode on the charge auxiliary layer, wherein the light-absorption layer and the light-absorption auxiliary layer are in contact with each other, the light-absorption layer and the light-absorption auxiliary layer are configured to selectively absorb light in a green wavelength region, characterized in that the second p-type light-absorption material or the second n-type light-absorption material has a smaller full width at half maximum (FWHM) than the light-absorption layer in the green wavelength region; the charge auxiliary layer is configured to allow holes and electrons separated in the light-absorption layer to transfer to the second electrode; the charge auxiliary layer is configured to not substantially absorb light in a visible wavelength region; wherein each of the first electrode and the second electrode is a light-transmitting electrode, and the second electrode is at a side from which light is incident.