1. An image sensor, comprising: a first pixel region comprising a pixel electrode, an optically sensitive material of a first thickness, and a counterelectrode; a second pixel region comprising a pixel electrode, an optically sensitive material of a second thickness, and a counterelectrode; the first pixel region is configured to detect light in a first spectral band; the second pixel region is configured to detect light in a second spectral band; and the first and second spectral bands include an overlapping spectral range, the second spectral band also includes a spectral range that is substantially undetectable by the first pixel region.