Patent ID: 9741972
Date: 2017-08-22
CPC Classifications: H01L

Claim:
1. A preparation method of an OLED device, comprising: providing a substrate; and sequentially forming a plurality of functional layers on the substrate, wherein one functional layer of the plurality of functional layers is a transition functional layer, the transition functional layer comprises a first sub-layer and a second sub-layer provided on the first sub-layer, and the first sub-layer and the second sub-layer are made of a same material; and a preparation procedure of the transition functional layer comprises: the first sub-layer is prepared by using a first process, and the second sub-layer is prepared by using a second process different from the first process, wherein the first process is a solution process, and the second process is any one of vacuum thermal evaporation process, organic vapor phase deposition process, laser induced thermal imaging process, and radiation-induced sublimation transfer process.