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Reactive Sputtering Process for CuIn 1-xGaxSe 2 Thin Film Solar Cells
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- Authors
- Nae-Man Park, Ho Sub Lee, Jeha Kim
- Issue Date
- 2012-10
- Citation
- ETRI Journal, v.34, no.5, pp.779-782
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Project Code
- 11MB3100, Development of High Efficiency CIGS Ultra Thin-Film Solar Cells by Reactive Sputtering, Kim Je Ha
- Abstract
- CuIn 1-xGaxSe 2 (CIGS) thin films are grown on Mo/soda lime glass using a reactive sputtering process in which a Se cracker is used to deliver reactive Se molecules. The Cu and (In 0.7Ga 0.3) 2Se 3 targets are simultaneously sputtered under the delivery of reactive Se. The effects of Se flux on film composition are investigated. The Cu/(In+Ga) composition ratio increases as the Se flux increases at a plasma power of less than 30 W for the Cu target. The (112) crystal orientation becomes dominant, and crystal grain size is larger with Se flux. The power conversion efficiency of a solar cell fabricated using an 800-nm CIGS film is 8.5%. © 2012 ETRI.
- KSP Keywords
- CIGS film, Composition ratio, Conversion efficiency(C.E.), Crystal grain size, Film composition, Plasma power, Reactive sputtering process, Soda lime glass(SLG), Thin film solar cells, crystal orientation, power conversion efficiency