Optical device and methods for manufacturing the same
Provided are an optical device and a manufacturing method thereof. The method of manufacturing an optical device may include providing a substrate structure, and depositing an array including curved structures on the substrate structure. The curved structures may include a crystalline organic compound.
1. A method of manufacturing an optical device, the method comprising:
forming a substrate structure including a substrate, an anode layer, a cathode layer, and an intermediate layer between the anode layer and the cathode layer, the intermediate layer being one of a light-emitting layer and a light-absorbing layer;
heating a precursor to form an organic vapor under a pressure condition of from 10 −4 Torr to 1 Torr; and
depositing the organic vapor on the substrate structure by organic vapor phase deposition or thermal evaporation to form an array of curved structures by crystallization of the organic vapors, the array of curved structures spaced apart from each other, on the substrate structure, each of the curved structures among the array of curved structures having a curved surface facing away from the surface of the substrate structure;
wherein the curved structures comprise a crystalline organic compound, and
wherein the intermediate layer either emits a first light to the curved structures based on a first voltage between the anode layer and the cathode layer or receives a second light from the curved structures to generate a second voltage between the anode layer and the cathode layer.
2. The method of claim 1 , wherein the precursor comprises an amorphous organic compound.
3. The method of claim 1 , wherein the heating of the precursor is performed in a temperature range of from 200° C. to 400° C.
4. The method of claim 1 , wherein the substrate structure is provided at a temperature of from −20° C. to 80° C. during the deposition of the array.
5. The method of claim 1 , wherein the crystalline organic compound has a pi-conjugation structure.
6. The method of claim 1 , wherein each of the curved structures comprises a first grain and a second grain, and
the second grain has a different crystal structure or a different crystal orientation from the first grain.
7. The method of claim 1 , wherein a surface tension of each of the curved structures is higher than surface tension of a top surface of the substrate structure.
8. The method of claim 1 , wherein a sum of a surface tension of each respective curved structure and a surface tension at an interface between a top surface of the substrate structure and each respective curved structure is greater than a surface tension of the top surface of the substrate structure.
9. The method of claim 1 , wherein the intermediate layer is the light-emitting layer that emits the first light toward the curved structures based on the first voltage applied to the anode layer and the cathode layer.
10. The method of claim 9 , wherein the intermediate layer is an organic light-emitting layer.
11. The method of claim 1 , wherein the intermediate layer is the light-absorbing layer that generates the second voltage between the anode layer and the cathode layer based on the second light received from the curved structures.