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Abstract

Provided are an artificial photosynthesis module and an artificial photosynthesis device that have excellent energy conversion efficiency. The artificial photosynthesis module includes a first electrode that decomposes a raw material fluid with light to obtain a first fluid; a second electrode that decomposes the raw material fluid with the light to obtain a second fluid; and a diaphragm disposed between the first electrode and the second electrode. The diaphragm is formed of a membrane having through-holes, is immersed in pure water having a temperature of 25° C. for one minute, and has a light transmittance of 60% or more in a wavelength range of 380 nm to 780 nm in a state where the diaphragm is immersed in the pure water. The average hole diameter of the through-holes of the diaphragm is more than 0.1 μm and less than 50 μm. An artificial photosynthesis device has the above-described artificial photosynthesis module.

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