Method for making material useful in optoelectronic device, the material and the optoelectronic device

1. A method for making a material comprising:

forming a film from a solution of a polytriarylamine and a compound comprising at least one functional group selected from arylamine and arylphosphine and at least two functional groups selected from vinyl, allyl, vinyl ether, epoxy, and acrylate; and

treating the film under heat and/or photoradiation;

wherein

the polytriarylamine comprises structural units of formula II

2. The method of claim 1 , further comprising rinsing the treated film.

3. The method of claim 1 , wherein the compound is of formula:

wherein

Ar 1 is a direct bond, an aryl or heteroaryl;

Ar 2 , and Ar 3 are, independently at each occurrence, an aryl or heteroaryl; and

A is, independently at each occurrence, O or a direct bond.

4. The method of claim 1 , wherein the compound is selected from:

5. The method of claim 4 , wherein the polytriarylamine and the compound is 1:1 in weight ratio in the solution.

6. A material made by the method of claim 1 .

7. An optoelectronic device comprising a material made by the method of claim 1 .

8. The optoelectronic device of claim 7 , wherein the compound is of formula

wherein

Ar 1 is a direct bond, an aryl or heteroaryl;

Ar 2 , and Ar 3 are, independently at each occurrence, an aryl or heteroaryl;

A is, independently at each occurrence, O or a direct bond.

9. The optoelectronic device of claim 7 , wherein the compound is selected from:

10. The optoelectronic device of claim 9 , wherein the polytriarylamine and the compound is 1:1 in weight ratio in the solution.

11. A method for making an optoelectronic device, comprising:

providing an electrode;

providing a light emission layer; and

providing between the electrode and the light emission layer a hole-transport layer comprising a material made by the method of claim 1 .