Method for producing a photoexcitation material

A method for producing a photoexcitation material, the method comprising:

• preparing a substrate;
• and
• depositing a powder of a material over the substrate using a He carrier gas according to a nano particle deposition method to form a thin film,
• wherein the thin film contains a wurtzite type solid solution crystal containing gallium, zinc, nitrogen and oxygen, and
• a peak (A) of an existence ratio of nitrogen or oxygen which is a first adjacent atom of the gallium or zinc and a peak (B) of an existence ratio of gallium or zinc which is a second adjacent atom of the gallium or zinc satisfy a relational expression of A>B in a relationship between a distance and the existence ratio of the adjacent atom of the gallium or zinc, the relationship being obtained from an extended X-ray absorption fine structure analysis.