Abstract: Disclosed are a display substrate and preparation method thereof, and a display device. The display substrate includes a display area (100) and a bonding area (200). On a plane perpendicular to the display substrate, the bonding area (200) includes a base substrate (10), a bonding structure layer (70) disposed on the base substrate (10), and a bonding pad (80) disposed on the bonding structure layer (70). The bonding pad (80) is configured to be bonded to connect to a circuit board; and at least includes a first bonding pad layer (210) and a second bonding pad layer (220), the first bonding pad layer (210) is disposed on a side of the second bonding pad layer (220) away from the base substrate (10), at least one first concave-convex structure (310) is disposed on a surface of a side of the first bonding pad layer (210) away from the base substrate (10).

Abstract: A display panel and a display apparatus. The display panel includes a backplane (10) and light-emitting devices (20). The backplane (10) includes: a base substrate (101); pixel driving circuits (102); a first insulating layer (103); conductive portions (104), wherein each of the conductive portions (104) is connected to a corresponding pixel driving circuit (102) via a first connector (CM1) penetrating through the first insulating layer (103); and a second insulating layer (105) located on the side of the first insulating layer (103) and the conductive portions (104) away from the base substrate (101). The light-emitting devices (20) are located on the side of the second insulating layer (105) away from the base substrate (101), wherein an anode (201) of at least one of the light-emitting devices (20) is connected to a corresponding conductive portion (104) via second connectors (CM2) penetrating through the second insulating layer (105).