The invention discloses a display panel and a display device. The display panel comprises an upper polarizer, a lower polarizer, a liquid crystal layer and an array substrate, wherein the liquid crystal layer and the array substrate are arranged between the upper polarizer and the lower polarizer, a plurality of pixel units are arranged on the array substrate, and each pixel unit is provided with a plurality of subpixel units displaying different colors. The display panel further comprises a quantum dot layer, wherein the quantum dot layer is arranged on the side, far from the liquid crystal layer, of the lower polarizer, and light is emitted by the quantum dot layer through the excitation of external light. According to the display panel displayed by the invention, light is emitted by the quantum dot layer through the excitation of external light, so that a light source does not need to be provided by a backlight module structure, and the lightening and thinning of the display device are realized.