Luminescence hydrogenated nanoamorphous Si films fabricated by reactive pulsed laser ablation

✍ Scribed by Wanbing Lu; Xingkuo Li; Xinzhan Wang; Liping Wu; Li Han; Guangsheng Fu; Wei Yu

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 808 KB
• Volume: 176
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2011.04.012

✦ Synopsis

Hydrogenated nanoamorphous Si (na-Si:H) films have been fabricated by reactive pulsed laser ablation technique with hydrogen as reactive gas. It is found that the hydrogen pressure has a great effect on both the structure and photoluminescence (PL) properties of the films. Increasing the hydrogen pressure leads to a structural transition of the films from amphorous Si to na-Si:H, and the PL center wavelength of the na-Si:H films is varied with the hydrogen pressure. The PL decay times of the na-Si:H films are in the nanosecond scale and are shorter on the high energy side of their PL spectrum. The results demonstrate that the na-Si:H films are promising candidates for visible, tunable and high-performance light-emitting devices.