LED chip, also known as the LED light emitting chip, is the core component of the LED light, which is also referred to as the P-N junction. Its main function is to convert electrical energy into light energy. The main material of the chip is monocrystalline silicon. The semiconductor wafer consists of two parts, one is a P-type semiconductor, in which holes are dominant, and the other end is an N-type semiconductor, which is mainly electrons. When the two semiconductors are connected, a P-N junction is formed between them. When the current is applied to the wafer through the wire, the electrons are pushed to the P area. In the P area, the electrons recombine with the holes, and then they emit energy in the form of photons. This is the principle of LED light emission. The wavelength of light, which is the color of light, is determined by the material that forms the P-N junction.