| abstract |
(57) Abstract: Even when a surface layer containing an optical semiconductor is fixed on a substrate containing Cu atoms, the optical semiconductor can sufficiently exhibit a hydrophilizing action by photoexcitation, and therefore, the surface of the article To provide a hydrophilic member capable of sufficiently exhibiting the effect of improving water washability and rain washability. SOLUTION: In a member in which an optical semiconductor-containing layer is formed on a surface of a substrate containing Cu atoms, wherein the layer surface exhibits hydrophilicity in response to optical excitation of the optical semiconductor, diffusion of Cu atoms to the surface layer is suppressed. Provide a layer to prevent. |