Patent ID: 8580604

Claim:
A method for preparing an OLED by an imprinting process, comprising the following steps: (A) providing a substrate, and a first electrode formed thereon, wherein a hole transport layer is formed on the first electrode; (B) coating a mold with a first organic material ink after the step (A); (C) pressing the mold coated with the first organic material ink onto the substrate, to transfer the first organic material ink on the hole transport layer to form a first light-emitting array after the step (B); (D) baking the substrate with the first light-emitting array formed thereon, wherein the substrate with the first light-emitting array formed thereon is baked at 30-200° C. for 10 minutes to 10 hours after the step (C); (D′) forming an electron transport layer on the first light-emitting array after the step (D); and (E) forming a second electrode over the first light-emitting array after the step (D′).