Donor substrates, methods of manufacturing donor substrates, organic light emitting display devices and methods of manufacturing organic light emitting display devices

1. A method of manufacturing a donor substrate, comprising:

forming a light to heat conversion layer on a base layer;

forming an interlayer on the light to heat conversion layer;

performing an ultraviolet surface treatment on the interlayer to form a treated upper surface of the interlayer;

forming a low molecular weight transfer layer using a low molecular weight material on the treated upper surface of the interlayer, the low molecular weight material comprising at least one selected from the group consisting of lithium (Li), sodium (Na), cesium (Cs), potassium (K), potassium fluoride (KF), lithium iodide (LiI) and potassium iodide (KI); and

forming an organic transfer layer on the low molecular weight transfer layer,

wherein the low molecular weight transfer layer facilitates electron transport and blocks hole transport.

2. The method of claim 1 , wherein the low molecular weight transfer layer includes at least one selected from the group consisting of potassium fluoride (KF), lithium iodide (LiI) and potassium iodide (KI).

3. The method of claim 2 , wherein the low molecular weight transfer layer is formed by a vacuum evaporation process or a sputtering process.

4. The method of claim 1 , wherein the treated upper surface of the interlayer has hydrophilicity, and the treated upper surface has dangling bonds.

5. The method of claim 4 , wherein the low molecular weight material is combined with the dangling bonds by a dipole interaction or an electrostatic attraction.

6. The method of claim 1 , further comprising performing a heat treatment and/or a plasma treatment on the interlayer prior to the ultraviolet surface treatment.

7. The method of claim 6 , wherein the heat treatment is performed at a temperature of from about 60° C. to about 150° C.