Enhancement of bulk nucleation in a-Si1-xGex on SiO2 for low-temperature solid-phase crystallization

T. Sadoh, I. Tsunoda, T. Nagata, A. Kenjo, M. Miyao

研究成果: Contribution to journalConference article査読

3 被引用数 (Scopus)


Nucleation phenomena in a-Si1-xGex films on SiO2 were examined in order to achieve low-temperature solid-phase crystallization. First, film thickness dependence of nucleation was investigated. The nucleation frequency per unit area increased with increasing film thickness, which was attributed to that bulk nucleation was dominant compared with interface or surface nucleation. Next, in order to enhance bulk nucleation in thin films, effects of the initial amorphicity modulation induced by Ar+ irradiation (25 keV, 1×1016 cm-2) before annealing were investigated. The incubation time for nucleation in pre-irradiated samples during subsequent annealing at 600 °C was significantly decreased to 1/20 of that without pre-irradiation, which was tentatively assigned to enhancement of atomic arrangement induced by densification of a-Si1-xGex films. It is expected that optimization of the irradiation conditions will realize low-temperature (<500 °C) formation of poly-Si1-xGex films on SiO2.

ジャーナルThin Solid Films
出版ステータス出版済み - 3 3 2003
イベントE-MRS, K - Strasbourg, フランス
継続期間: 6 18 20036 21 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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