TECHNOLOGY FOCUS - ELECTRONICS - Preferred Electrode: In the electrode for photoelectric conversion elements, the metal oxide layer is heat treated at 220-500 degrees C. The metal oxide layer satisfies a relation defined by: 2 less than or equal to I002/I101, where I002 denotes a peak intensity attributed to a zinc oxide (002) face in X-ray diffraction measurement, and I101 denotes a peak intensity attributed to a zinc oxide (101) face in X-ray diffraction measurement. The metal oxide layer is heat treated after being formed by electrolytic deposition. Preferred Method: In manufacturing the photoelectric conversion element electrode, in preparing the electrode, the base and a counter electrode are disposed so as to face each other in an electrolyte solution of a dye concentration of 50-500 mu M containing zinc salt and a first dye and a voltage of -0.8 to -1.2 V (vs. Ag/AgCl) is applied between the base and the counter electrode to form a composite layer in which the dye is co-adsorbed to zinc oxide, and subsequently the dye is desorbed from the composite layer, thus forming the metal oxide layer. Preferred Solar Cell: Alternatively, the dye-sensitized solar cell comprises: a working electrode in which a dye is carried by the electrode for photoelectric conversion elements; a counter electrode disposed so as to face the working electrode; and a charge transport layer disposed between the working electrode and the counter electrode. In a second alternative case, the dye-sensitized solar cell comprises: a working electrode in which a dye is carried by the electrode for photoelectric conversion elements; a counter electrode disposed so as to face the working electrode; and a charge transport layer disposed between the working electrode and the counter electrode. In a third alternative case, the dye-sensitized solar cell comprises: a working electrode in which a dye is carried by the electrode for photoelectric conversion elements; a counter electrode disposed so as to face the working electrode; and a charge transport layer disposed between the working electrode and the counter electrode.