High-Rate Deposition of a-Si:H Film with a Separated Plasma Triode Method

Abstract
The separated plasma triode (SPT) method has been developed to deposit high-quality a-Si:H films at high deposition rates. Plasma properties were measured by a probe method and an optical emission spectroscopy (OES) method. It is possible to improve the electron density in a plasma without increasing the plasma potential near the substrate by the SPT method. High-quality a-Si:H films and high-performance a-Si solar cells were obtained at high deposition rates using the SPT method.