Method for forming a compound semi-conductor thin-film
A method is provided for fabricating a thin film semiconductor device. The method includes providing a plurality of raw semiconductor materials. The raw semiconductor materials undergo a pre-reacting process to form a homogeneous compound semiconductor target material. The compound semiconductor target material is deposited onto a substrate to form a thin film having a composition substantially the same as a composition of the compound semiconductor target material.
1. A method of fabricating a thin-film semiconductor device, comprising:
providing a plurality of raw semiconductor materials;
pre-reacting the raw semiconductor materials to form a homogeneous compound semiconductor target material; and
depositing the compound semiconductor target material onto a substrate to form a thin-film having a composition substantially the same as a composition of the compound semiconductor target material.
2. The method of claim 1 wherein the raw semiconductor materials include II-VI compound semiconductor materials.
3. The method of claim 2 wherein the II-VI compound semiconductor materials are selected from the group consisting of Cd—S, Cd—Se, Cd—Te, Cd—Zn—Te, Cd—Hg—Te, and Cu—In—Se.
4. The method of claim 3 further comprising providing Cu as a minor constituent along with the II-VI compound semiconductor materials.
5. The method of claim 1 wherein the raw semiconductor materials include I-III-VI compound semiconductor materials.
6. The method of claim 5 wherein the I-III-VI compound semiconductor materials are selected from the group consisting of Cu—In—Se, Cu—In—Ga—Se, Cu—In—Ga—Se—S.
7. The method of claim 6 further comprising providing Al in complete or partial substitution for Ga.
8. The method of claim 5 further comprising providing Na as a minor constituent along with the I-III-VI compound semiconductor materials.
9. The method of claim 5 further comprising providing an alkali element other than Na as a minor constituent long with the I-III-VI compound semiconductor materials.
10. The method of claim 9 further comprising providing F as a minor constituent along with the I-III-VI compound semiconductor materials.
11. The method of claim 9 further comprising providing a halogen element other than F as a minor constituent along with the I-III-VI compound semiconductor materials.
12. The method of claim 1 wherein the compound semiconductor target material is deposited by physical vapor deposition.
13. The method of claim 12 wherein the compound semiconductor target material is deposited by magnetron sputtering.
14. The method of claim 12 wherein the compound semiconductor target material is deposited by laser ablation.
15. The method of claim 1 wherein pre-reacting the raw semiconductor materials includes isolating the raw semiconductor materials at an elevated temperature to establish a structure and bonding profile representative of the deposited thin-film.
16. A thin-film semiconductor device fabricated in accordance with the method set forth in claim 1 .
17. The method of claim 1 wherein the raw semiconductor materials are pre-reacted above a liquidus temperature of the compound semiconductor target material.