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Optical absorption and electrical conductivity in amorphous In-Zn-O: A new TCO for CIGS PV
- Source :
- 2009 34th IEEE Photovoltaic Specialists Conference (PVSC).
- Publication Year :
- 2009
- Publisher :
- IEEE, 2009.
-
Abstract
- We report the coupled optical and electrical properties of a-IZO films as a function of both the metals composition and the %O 2 in the Ar/O 2 sputter gas mix. In particular, a-IZO films with conductivity δ ≫ 2000 S/cm can be grown for a broad range of metals compositions (60 to 85 at.% In) as long as the corresponding optimal oxygen level is used in the deposition. The amount of oxygen required increases with increasing indium content. When too much oxygen is used, the a-IZO remains clear but the conductivity is reduced due to a decreased carrier concentration. Whereas, when too little oxygen is used, the conductivity is reduced due to decreased electron mobility and there is a concurrent increase in the optical absorption from 400 to 1000 nm which renders the oxygen deficient a-IZO samples gray.
- Subjects :
- Electron mobility
Materials science
business.industry
Analytical chemistry
chemistry.chemical_element
Conductivity
Oxygen
Copper indium gallium selenide solar cells
Amorphous solid
chemistry
Electrical resistivity and conductivity
Optoelectronics
Absorption (electromagnetic radiation)
business
Indium
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2009 34th IEEE Photovoltaic Specialists Conference (PVSC)
- Accession number :
- edsair.doi...........4742d47d7c38604b8ce0daf4914b3db4