Optical properties of alumina ceramics substrates for thin film crystalline Si solar cells

摘要

In this report, we propose an analytical expression for diffuse reflectance of alumina ceramics and confirm its validity by comparing with diffuse reflectance measurements with a newly designed spectrophotometer. We also propose a method ofimproving optical confinement efficiency in thin film Si solar cells. This method includes deposition of thin films with appropriate refractive index and thickness on the alumina ceramics substrates.