Fuel cell based on p-type and n-type semiconductors

A single chamber fuel cell (10) comprised of a cell arranged in a mixed fuel gas comprised of hydrogen or another fuel gas and oxygen, wherein the cell used is a pn junction type semiconductor having electrodes (12) of a p-type semiconductor with carriers of holes and an n-type semiconductor (14) with carriers of electrons connected to ends of electrical takeout wires (12a, 14a), and each of the p-type semiconductor (12) and n-type semiconductor (14) is formed porous to an extent enabling the mixed fuel gas to pass through. A mixed pn layer (16) is located between the electrodes (12, 14) to increase the reaction interface.