An information input module for an electronic device includes a substrate, a first electrode made up of transparent conductive materials, a second electrode, and a solar cell layer disposed between the first and second electrodes. The solar cell layer includes a plurality of solar cells electrically insulated from each other. The plurality of solar cells generates electrical signals in response to a user's operations to activate functions of the electronic device. The first electrode is disposed between the substrate and the solar cell layer. Both the first and second electrodes are electrically connected to each of the plurality of solar cells for transmitting the electrical signals to the electronic device. The electrical signals reflect changes of electrical parameters of one or more solar cells of the plurality of solar cells when light beams are blocked from reaching on, wholly or partially, the one or more solar cells.