Photoelectric conversion element

Abstract

A photoelectric conversion element includes: a first electrode having a porous oxide semiconductor layer which supports a sensitizing dye on a surface thereof and functioning as a photo electrode; a second electrode disposed so as to oppose the first electrode; an electrolyte disposed in at least a part of a space between the first electrode and the second electrode; and a sump portion for the electrolyte disposed in at least a part of the space between the first electrode and the second electrode. According to the present invention, air bubbles can be exhausted effectively from power generating area, so that a photoelectric conversion element possessing an improved power generation property and a long-term durability can be provided.

1 - 14 . (canceled) 
     
     
         15 . A photoelectric conversion element comprising:
 a first electrode having a porous oxide semiconductor layer which supports a sensitizing dye on a surface thereof and functioning as a photo electrode;   a second electrode dispose so as to oppose the first electrode;   an electrolyte disposed in at least a part of a space between the first electrode and the second electrode;   a collector wiring composed of a conductive material provided in the first electrode; and   a sump portion for the electrolyte provided around the collector wiring.   
     
     
         16 . The photoelectric conversion element according to  claim 15 , wherein the sump portion is composed of a recessed portion formed in the second electrode. 
     
     
         17 . The photoelectric conversion element according to  claim 16 , wherein the sump portion is provided in a position which corresponds to that of the collector wiring along a thickness direction. 
     
     
         18 . The photoelectric conversion element according to  claim 16 , wherein the recessed portions are provided in continuous arrangement along the collector wiring. 
     
     
         19 . The photoelectric conversion element according to  claim 16 , wherein the recessed portion is provided with an inclined portion. 
     
     
         20 . The photoelectric conversion element according to  claim 15 , wherein a layer of a capillary structure is provided on at least a part of the porous oxide semiconductor layer of the first electrode. 
     
     
         21 . The photoelectric conversion element according to  claim 15 , wherein a capillary structure is provide at least on the collector wiring.