Method and materials for patterning of an amorphous, non-polymeric, organic matrix with electrically active material disposed therein
View Patent ↗In one method of making an organic electroluminescent device, a transfer layer is solution coated on a donor substrate. The transfer layer includes an amorphous, non-polymeric, organic matrix with a light emitting material disposed in the matrix. The transfer layer is then selectively patterned on a receptor. Examples of patterning methods include laser thermal transfer or thermal head transfer. The method and associated materials can be used to form, for example, organic electroluminescent devices.
1. A method of making an electroluminescent device, comprising:
forming a first device layer on a donor element by using a solvent to solution coat an amorphous non-polymeric electroactive material onto a donor element, wherein the electroactive material is a hole blocking material or an electron transport material;
substantially removing the solvent from the donor element;
forming at least one additional electroactive layer on the donor element; and
selectively thermal transferring the first device layer and the additional layer from the donor element to a receptor.
2. The method of claim 1 , wherein the forming the at least one additional layer step includes forming a light emitting material layer.
3. The method of claim 1 , wherein the forming the at least one additional layer step includes forming a hole transport layer.
4. The method of claim 3 , wherein the forming the at least one additional layer step includes forming a hole injection layer.
5. A method of making an electroluminescent device, comprising:
forming a first device layer on a donor element by using a solvent to solution coat a non-polymeric coating composition comprising an amorphous non-polymeric electroactive material onto a donor element;
substantially removing the solvent from the donor element;
forming at least one additional electroactive layer on the donor element; and
selectively thermal transferring the first device layer and the additional layer from the donor element to a receptor.
6. The method of claim 5 , wherein the forming the first device layer step includes forming a hole blocking material as the electroactive material.
7. The method of claim 5 , wherein the forming the first device layer step includes forming an electron transport material as the electroactive material.
8. The method of claim 5 , wherein the forming the at least one additional layer step includes forming a light emitting material layer.
9. The method of claim 5 , wherein the forming the at least one additional layer step includes forming a hole transport layer.
10. The method of claim 9 , wherein the forming the at least one additional layer step includes forming a hole injection layer.