10-chloronaphtho[2,1-b]benzofuran is a Furan derivative. It is an intermediate of optoelectronic materials. The product is used to produce OLED organic semiconductor light sources. It can simulate sunlight to the greatest extent, and the luminous band covers the ultraviolet band to the far infrared band. It includes red, blue, and green visible light OLED devices for semiconductor display, ultraviolet OLED, ultraviolet semiconductor lasers, infrared OLED, and infrared semiconductor laser technologies and applications.