Electrode for photoelectric conversion elements, manufacturing method of the same, and dye-sensitized solar cell

Abstract

An electrode for photoelectric conversion elements having high initial characteristics and excellent durability, a manufacturing method of the electrode for photoelectric conversion elements, and a dye-sensitized solar cell are provided. An electrode for photoelectric conversion elements 11 according to the present invention has a structure in which a metal oxide layer 14 containing zinc oxide is provided on a base 12. The metal oxide layer 14 has a plurality of bump-like protrusions 14a formed so as to protrude radially from the base 12 side, and also has an emission peak in a region of 350 to 400 nm in cathodoluminescence measurement. The metal oxide layer is preferably heat treated at 220 to 500 DEG C.

Description

technical field The present invention relates to an electrode for a photoelectric conversion element, a method for producing the same, and a dye-sensitized solar cell including the electrode for a photoelectric conversion element. Background technique In recent years, solar power generation has been attracting attention as a promising solution to environmental problems represented by the depletion of fossil fuel resources and the reduction of carbon dioxide emissions. Typical examples of the solar power generation, that is, solar cells include monocrystalline silicon and polycrystalline silicon solar cells, and these solar cells are already on the market and are generally widely known. However, in this technical field, concerns about the shortage of silicon, which is a main raw material, have recently been increasing. To this end, it is expected that the next generation of non-silicon solar cells (such as CuInGaSe 2 (CIGS, etc.) The dye-sensitized solar cell published by...

AI Technical Summary

Problems solved by technology

However, when an electrode produced by the electrolysis method described in Patent Documents 1 and 2 is used as a working electrode of a photoelectric conversion element (such as a dye-sensitized solar cell), the initial characteristics (just produced The final photoelectric conversion efficiency) is relatively high, but the performance deterioration over time is large, and the durability (reliability) is not sufficient

In addition, when an electrode produced by firing the semiconductor microparticles described in Patent Document 3 is used as a working electrode of a photoelectric conversion element, the durability is relatively good, but the initial characteristics are insufficient.

On the other hand, the performance evaluation of the ZnO whisker film formed by the aqueous solution process described in Patent Document 4 as a working electrode for a photoelectric conversion element is insufficient. In addition, ZnO crystals grown anisotropically in the c-axis direction Whiskers (particles) are accumulated in a state of straddling the substrate, so it is considered that they are far from being practical for photoelectric conversion elements that require high photoelectric conversion efficiency.

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