Investigation of a-SiOx:H films as passivation layer in heterojunction interface

In this study, the intrinsic hydrogenated amorphous silicon oxide (a-SiOx:H) thin films were prepared by Electron Cyclotron Resonance Chemical Vapor Deposition (ECR-CVD). High density plasma of ECR-CVD has many advantages: (1) faster deposition rate, (2) no electrode contamination, (3) low ion bombardment. The process parameters effect on a-SiOx:H thin films such as dilution ratio was investigated. In addition, this material will be applied to amorphous silicon / crystalline silicon heterojunction solar cells and improved the open-circuit voltage of solar cells.