Fence garden outdoor solar LED lights related knowledge: electronic waves in solar cells. From the perspective of electronic waves, the electron waves in the body and the waves of free electrons are very different. This is because the atoms are positively charged and can attract the negatively charged electrons tightly. If used to indicate the distance of the electron from the center of the nucleus, the potential energy near the atom with the number of charges Z is -Zer. Since the atoms are arranged according to the periodic rule of the lattice constant a, the potential field also has periodicity. Therefore, the periodic potential field like this: the electron wave is not only a plane wave, but a varying plane wave (Bloch wave) whose amplitude changes according to the lattice period and can be represented by a periodic function. Due to the interference of the electron wave, the electron waves reflected by the periodic potential field in the two band gap bodies at the standing wave trough position interfere with each other to form a complex electron wave. When the wavelength of the electron wave is an integral multiple of the character constant, it will be generated. Standing wave.