Transparent conductive oxide coating for thin film photovoltaic applications and methods of making the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-017/34
C23C-016/40
H01L-031/18
H01L-031/0216
출원번호
US-0263648
(2008-11-03)
등록번호
US-9181124
(2015-11-10)
발명자
/ 주소
Cording, Christopher R.
Masumo, Kunio
Agustsson, Sveinn Otto
출원인 / 주소
AGC FLAT GLASS NORTH AMERICA, INC.
대리인 / 주소
Rothwell, Figg, Ernst & Manbeck, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
43
초록▼
The present invention provides transparent conductive oxide (TCO) thin films with improved optical and electrical properties and methods of making the same. More specifically, the invention provides on-line processes for producing TCO thin films that allow for improvements in optical properties and
The present invention provides transparent conductive oxide (TCO) thin films with improved optical and electrical properties and methods of making the same. More specifically, the invention provides on-line processes for producing TCO thin films that allow for improvements in optical properties and post-production improvements in electrical properties of the TCO.
대표청구항▼
1. A method of making a thin film device, the method comprising: depositing a first layer by pyrolytic chemical vapor deposition onto at least a portion of a substrate;depositing a second layer by pyrolytic chemical vapor deposition to form a transparent conductive film over at least a portion of th
1. A method of making a thin film device, the method comprising: depositing a first layer by pyrolytic chemical vapor deposition onto at least a portion of a substrate;depositing a second layer by pyrolytic chemical vapor deposition to form a transparent conductive film over at least a portion of the deposited first layer, the second layer comprising a tin oxide and being deposited from a gaseous mixture in the presence of an oxidizing chemical vapor and at an elevated temperature; andcooling the deposited first and second layers from the elevated temperature to ambient temperature in a non-oxidizing or slightly reducing atmosphere so as to provide a post-production increase of electrical conductivity of the second layer by at least 2%,wherein the oxidizing vapor is mixed with the gaseous mixture before said depositing of the second layer, for which the gaseous mixture is provided at 0.20-2.00 kg/min and comprises 70-95% monobutyl tin trichloride and 5-20% trifluoroacetic acid, andwherein the oxidizing chemical is selected from the group consisting of peroxides, nitric acid, nitrates, nitrites, nitrous oxide, sulfuric acid, sulfates, persulfates, hypochloric acid, chlorates, perchlorates, bromate, borates, and combinations thereof. 2. The method of claim 1, wherein the substrate is a glass substrate. 3. The method of claim 1, wherein the second layer comprises tin oxide, indium tin oxide, fluorine doped tin oxide, zinc tin oxide, or combinations thereof. 4. The method of claim 1, wherein the second layer comprises fluorine doped tin oxide. 5. The method of claim 1, wherein the first layer comprises silicon. 6. The method of claim 1, wherein the first layer comprises silicon in the form of an oxide, nitride, carbide, or combinations thereof. 7. The method of claim 1, wherein the first layer comprises silicon oxide, silicon dioxide, silicon nitride, silicon oxynitride, silicon carbide, silicon oxycarbide, or combinations thereof. 8. The method of claim 1, wherein the first layer comprises silicon oxycarbide. 9. The method of claim 1, wherein the oxidizing chemical is selected from the group consisting of nitric acid, nitrous oxide, hypochloric acid, and sulfuric acid. 10. The method of claim 1, wherein the oxidizing chemical agent is nitric acid. 11. The method of claim 1, wherein the elevated temperature is a temperature in the range of 200° C. to 800° C. 12. The method of claim 1, wherein the elevated temperature is a temperature in the range of 450° C. to 750° C. 13. The method of claim 1, wherein the first layer has a thickness of 400 Å to 1000 Å. 14. The method of claim 1, wherein the first layer has a thickness of 600 Å to 900 Å. 15. The method of claim 1, wherein the first layer has a thickness of 700 Å to 800 Å. 16. The method of claim 1, wherein the second layer has a thickness of 300 nm to 1200 nm. 17. The method of claim 1, wherein the second layer has a thickness of 500 nm to 1000 nm. 18. The method of claim 1, wherein the oxidizing chemical provides an increase in light transmittance by at least about 2%. 19. The method of claim 1, wherein said deposition of the first layer further comprises providing 2.0-40.0 g/min of silane, 50.0-300.0 g/min of carbon dioxide, 0.0-110.0 g/min of ethylene, and 0.0-200.0 g/min of nitrogen. 20. The method of claim 1, wherein said deposition of the second layer further comprises providing 0.00-5.00 kg/min of water vapor, 0.00-2.00 kg/min of air, and 0.20-1.50 kg/min of an aqueous solution of 60%-80% nitric acid.
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