A display panel, a display device, and a method of manufacturing a display panel are provided. As an example, the display panel includes an array layer, a planarization layer, an inorganic layer, and at least one dam. The array layer includes a first region and a second region surrounding the first region. The planarization layer is at least partially located on a portion of the array layer which is at the first region. The inorganic layer is located on a portion of the array layer which is at the second region. The at least one dam is formed on the inorganic layer.