Light-receiving device and image sensor

A differential response light-receiving device comprising:

• a semiconductor electrode comprising an electrically conductive layer and a photosensitive layer containing a semiconductor sensitized by a dye;
• an ion-conductive electrolyte layer;
• and a counter electrode, said differential response light-receiving device making time-differential response to quantity of light to output a photoelectric current, said semiconductor sensitized by a dye primarily absorbing light to cause the generation of electrons and positive holes in said dye, and thereafter said semiconductor receiving and conveying said electrons or said holes,
• wherein said ion-conductive electrolyte layer is free of redox species, and wherein said semiconductor is a metal chalcogenide.