Abstract: A device capable of converting radiant energy to electrical energy and storing said electrical energy for future use is described. The device comprises a pair of electrodes, at least one of which is transparent, a compensator layer in contact with one of said electrodes, and a layer of a charge storage material in contact with the other of said electrodes and said compensator layer.

Abstract: A charge storing photogalvanic cell including spaced electrode and counterelectrode "sandwiching" a charge storage layer and a compensating layer. Various dopants to the charge storage layer have been determined to vary cell performance as follows: increasing photosensitivity and charge retention; increasing electrical response; increasing device life; decreasing charge retention; changing optical absorption of charge storage layer; or localizing destruction of charge storage capability.

Abstract: A photogalvanic cell has a glass substrate through which irradiating light passes. A light transparent conductive thin film serves as an electrode, the film being deposited upon the glass substrate. Another layer is an electrolyte and includes an aqueous medium having TiO.sub.2 suspended therein, the TiO.sub.2 forming photoactive sites with the remaining ingredients of the electrolyte. The electrolyte layer further includes N-methylphenazine methosulfate dye which has photoconversion and electrical storage properties. During irradiation the cell may drive a load, or stored energy resulting from irradiation may drive a load after the source of irradiation is removed.

Abstract: An electrochromic device comprises, in a layered structure, a first electrode, an electrochromic material, an electrolyte and a back electrode which is of a material different than said first electrode. The device is characterized as having a nonlinear voltage response, a well defined threshhold, and an internal electromotive force which is uniquely determined by the color state of the device.