Photolithographic patterning of organic electronic devices
A method of patterning an organic device includes depositing a first organic functional layer over a device substrate to form a first intermediate structure, the first organic functional layer having a first function such as hole transport or electron transport. The first intermediate structure is coated with a fluoropolymer and treated in a processing agent comprising a fluorinated solvent in which the fluoropolymer is soluble to form a processed intermediate structure. A second organic functional layer is deposited over at least a portion of the first organic functional layer, the second organic functional layer also having the first function.
1. An OLED device comprising:
a hole-injecting layer;
an electron-injecting layer;
a first organic functional layer having a first function;
a second organic functional layer also having the first function and provided over at least a portion of the first organic functional layer; and
a fluorinated polymer disposed between the first and second organic functional layers, the fluorinated polymer forming a continuous or discontinuous film having a thickness of less than 2 nm,
wherein the first and second organic functional layers are disposed between the hole-injecting layer and the electron-injecting layer.
2. The OLED device of claim 1 wherein the fluorinated polymer is one or two monolayers thick.
3. The OLED device of claim 1 wherein the first function is a hole transport function.
4. The OLED device of claim 1 wherein the first and second organic functional layers are small-molecule materials.
5. The OLED device of claim 1 wherein the first and second organic functional layers have different chemical compositions.
6. The OLED device of claim 1 wherein the first and second organic functional layers comprise at least one common material.
7. The OLED device of claim 1 wherein the first and second organic functional layers have the same chemical composition.
8. The OLED device of claim 7 wherein the first and second organic functional layers have different thicknesses.
9. The OLED device of claim 1 wherein the first function is an electron transport function.
10. The OLED device of claim 1 wherein the first function is a hole-blocking function.