Low-reflection coating, low-reflection coated substrate, and photoelectric conversion device

A low-reflection coated substrate, comprising:

• a glass sheet;
• and
• a low-reflection coating formed on at least one principal surface of the glass sheet,
• wherein the low-reflection coating is a porous film and comprises:
• fine silica particles that are solid and spherical and have an average particle diameter of 80 to 150 nm;
• and
• a binder containing silica as a main component,
• wherein the fine silica particles are bound together by the binder, and the binder further contains an aluminum compound,
• wherein the low-reflection coating contains the following components:
• 55 to 70 mass % of the fine silica particles;
• 25 to 40 mass % of the silica of the binder;
• and
• 2 to 7 mass % of the aluminum compound expressed in a form of Al2O3,
• the low-reflection coating has a thickness of 80 to 800 nm,
• the low-reflection coating yields a transmittance gain of 2.5% or more, the transmittance gain representing an increase in average transmittance of the glass sheet provided with the low-reflection coating relative to the glass sheet not provided with the low-reflection coating, the average transmittance being measured in the wavelength range of 380 to 850 nm,
• the principal surface has an average reflectance of 5.1% or more at a wavelength range of 380 to 850 nm when measured in the absence of the low-reflection coating on the principal surface, and
• an outermost portion of the principal surface having the low-reflection coating formed thereon contains 3.5 to 24 mass % of tin oxide.