24‐4: Flexible AMOLED based on Oxide TFT with High Mobility

We report a high performance foldable and rollable AMOLED display with 300 ppi (real RGB) driven by oxide thin film transistors (TFTs) based on a polyimide (PI) substrate. No new defects appear on the display after 100,000 times bending with radius of curvature at 3 mm. In the oxide TFT, the Lanthanide rare earth doped In‐Zn‐O (LnIZO) is employed as the key active layer to improve the mobility and stability. The fabricated Ln‐IZO TFT with BCE process exhibits a high field‐effect mobility of ~40 cm 2 V ‐1 s ‐1 , a subthreshold swing of 0.13 V/decade, and an I on /I off ratio of 10 9 . Meanwhile, laminated Al 2 O 3 /MgO film prepared by the method of atomic layer deposition (ALD) is used as the encapsulation of AMOLED display.