The present disclosure provides an array substrate, an electronic device and a manufacturing method of the array substrate. The array substrate includes a base substrate, and a first transistor and a second transistor on the base substrate, a first electrode of the first transistor being connected to a second electrode of the second transistor; the array substrate further includes a photodiode including a first electrode, a second electrode, and a photosensitive layer between the first electrode and the second electrode, and the first electrode is electrically connected to a gate of the first transistor. In the arrangement, the first transistor and the second transistor are connected in series to form one control unit, and the uniformity and stability of the control unit are greatly improved.