Image sensors

The image sensor of claim wherein the first substrate further includes:

• a pad region adjacent to the active pixel region;
• and
• a deep trench isolation film extending from the second surface of the first substrate into the first substrate in the pad region,
• wherein the active pixel region does not include the deep trench isolation film.

An image sensor comprising:

• a first substrate. including an active pixel region having first, second. and third active pixels;
• first, second and third lower electrode structures are disposed on the first substrate and respectively correspond to the first, second and third active pixels;
• an upper electrode is disposed on the first, second and third lower electrode structures;
• an organic photoelectric conversion layer is disposed between the first lower electrode structure and the upper electrode, between the second lower electrode structure and the upper electrode, and between the third lower electrode structure and the upper electrode;
• and
• first, second and third color filter layers are disposed on the upper electrode and respectively correspond to the first, second and third active pixels,
• wherein at least one of the first, second and third lower electrode structures includes:
• a first barrier layer;
• a reflective layer disposed on the first barrier layer;
• and
• a second barrier layer disposed on the reflective layer.

An image sensor comprising:

• a first substrate having a first surface and a second surface opposite to the first surface, the first substrate including an active pixel region having a plurality of active pixels;
• a plurality of lower electrode structures disposed on the second surface of the first substrate and corresponding to the plurality of active pixels, each of the plurality of lower electrode structures including a first barrier layer, a reflective layer, and a second harrier layer;
• an upper electrode disposed on the plurality of lower electrode structures;
• an organic photoelectric conversion layer disposed between the plurality of lower electrode structures and the upper electrode;
• a color filter layer disposed on the upper electrode and corresponding to the plurality of active pixels;
• and
• a second substrate disposed on the first surface of the first substrate, a driving circuit configured to drive the plurality of active pixels is disposed on the second substrate,
• wherein the first substrate does not include a photodiode.