Studies on surface roughness and growth mechanisms of microcrystalline silicon films by grazing incidence X-ray reflectivity Article

Zhou, BQ, Liu, FZ, Zhu, MF et al. (2007). Studies on surface roughness and growth mechanisms of microcrystalline silicon films by grazing incidence X-ray reflectivity . 56(4), 2422-2427.



cited authors

  • Zhou, BQ; Liu, FZ; Zhu, MF; Zhou, YQ; Wu, ZH; Chen, X

fiu authors

abstract

  • The microcrystalline silicon films at different growth stages were deposited by plasma-enhanced chemical vapor deposition (PECVD). The reflectivity of grazing incidence X-ray from synchrotron radiation has been applied to investigate the evolution of surface roughness of these thin films. By study of surface morphology of microcrystalline silicon (μc-Si:H), we understand their growth kinetics and growth mechanism. The results show that the growth exponent β is 0.21 ± 0.01 and 0.24 ±0.01 for μc-Si:H films deposited on glass substrate at fixed substrate temperature, Under the following condition of electrode distance, pressure, rf power density, H2 diluted at 200°C. to be 2 cm, 6.66 × 102 Pa and 0.22 W/cm2, 99% and 98%, respectively. According to the KPZ model in the PECVD case the growth mechanism of the μc-Si:H films is a finite diffusion growth.

publication date

  • April 1, 2007

start page

  • 2422

end page

  • 2427

volume

  • 56

issue

  • 4