An example embodiment of the image sensor includes a light-sensing device including a first electrode, a second electrode disposed opposite to the first electrode, and a photoelectric conversion layer positioned between the first electrode and the second electrode. The photoelectric conversion layer includes a block copolymer including electron donating blocks and electron accepting blocks. The electron donating blocks are deposited together and connected to the first electrode and the second electrode. The electron accepting blocks are deposited together and connected to the first electrode and the second electrode. A color filter may be positioned on the second electrode of the light-sensing device.