Optical Characteristics of Hydrogenated Amorphous Silicon Carbide Films Prepared at Various Gas Flow Rate Ratios
スポンサーリンク
概要
- 論文の詳細を見る
Hydrogenated amorphous silicon carbide (a-SiC:H) films were prepared using a home-built plasma-enhanced chemical vapor deposition (PECVD) system with different flow rate ratios of methane (CH4) and silane (SiH4) gases. Fourier-transform infrared (FTIR) spectra indicate multiple bonding configurations consisting of wagging, bending and stretching modes of silicon, hydrogen and carbon atoms with a steady depletion of Si–H wagging and stretching modes as the gas flow rate ratio increases. Micro-Raman spectra show evidence of amorphous silicon structure in all the films. Only the a-SiC:H film prepared at the highest CH4 to SiH4 gas flow rate ratio shows the existence of the Si–C vibrational mode. All the samples prepared show room-temperature luminescence with two peaks centered at 467 and 698 nm. The photoluminescence (PL) intensity increases as the CH4 to SiH4 gas flow rate ratio increases but a reduction in intensity is observed for a high CH4 to SiH4 gas flow rate ratio. a-SiC:H films with higher optical energy gaps were obtained by allowing the gases to flow at higher CH4 to SiH4 gas flow rate ratios.
- 2007-10-15
論文 | ランダム
- 技術の質的改善
- 油空圧制御系-10-フルイディスク制御系
- 油空圧技術10年のあゆみ「フルイディクス」 (〔日本油空圧協会〕創立10周年記念号)
- フルイディクス (〔油圧と空気圧〕緑陰特集号)
- ブルガーコフとベルリオーズ--『巨匠とマルガリータ』における意味論的引喩について (特集 ミハイル・ブルガーコフ(PART 1))