A display panel and a method of manufacturing the display panel, and a display device are disclosed. The display panel includes a display area and a non-display area. The display area includes a first display area and a second display area both bendable in relation to each other. The display panel includes a base substrate, a thin-film transistor layer, and a sensor. One or a plurality of through holes or grooves are disposed on the thin-film transistor layer, and the second is disposed facing the through hole or the groove.