公开(公告)号：US11737343B2

公开(公告)日：2023-08-22

申请号：US17276873

申请日：2019-09-16

申请人： PEROLED LIMITED

发明人： Peter Levermore

IPC分类号： H10K50/15 ,  H10K71/00 ,  H10K50/16 ,  H10K50/17 ,  H10K50/18 ,  H10K50/135 ,  H10K59/122 ,  H10K71/40 ,  H10K71/13 ,  H10K102/00

CPC分类号： H10K71/00 ,  H10K50/135 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K50/171 ,  H10K50/18 ,  H10K59/122 ,  H10K71/135 ,  H10K71/40 ,  H10K2102/321 ,  H10K2102/351 ,  H10K2102/361

摘要： A method of fabricating a perovskite light emitting device is provided. In one embodiment, the method comprises the steps of: providing a substrate; providing a first electrode disposed over the substrate; providing a bank structure disposed over the substrate, wherein the bank structure is patterned so as to define at least one sub-pixel on the substrate; providing a first transport layer ink, wherein the first transport layer ink comprises at least one solvent and at least one first charge transport material mixed in the at least one solvent; depositing the first transport layer ink into the at least one sub-pixel over the first electrode using a method of inkjet printing; vacuum drying the first transport layer ink inside a vacuum drying chamber to assemble a first transport layer over the first electrode in the at least one sub-pixel; annealing the first transport layer; providing a perovskite ink, wherein the perovskite ink comprises at least one solvent and at least one perovskite light emitting material mixed in the at least one solvent; depositing the perovskite ink into the at least one sub-pixel over the first transport layer using a method of inkjet printing; vacuum drying the perovskite ink inside a vacuum drying chamber to assemble a perovskite emissive layer over the first transport layer in the at least one sub-pixel; annealing the perovskite emissive layer; and depositing a second electrode over the perovskite emissive layer using a method of vapour deposition. Perovskite light emitting devices and displays fabricated using the provided method are also provided.