Various embodiments include methods and apparatuses for forming and using pixels for image sensors. In one embodiment, an image sensor is disclosed. The image sensor includes an optically sensitive material; a plurality of electrodes proximate the optically sensitive material, including at least a first electrode, a second electrode and a third electrode; and a charge store. The first electrode is coupled to the charge store, and the first electrode and the second electrode are configured to provide a bias to the optically sensitive material to direct photocarriers to the charge store. Other methods and apparatuses are disclosed.