Hydrogenated Amorphous Silicon (a-Si:H) Colloids

被引：64
|
作者：
Harris, Justin T. [1 ]
Hueso, Jose L. [1 ]
Korgel, Brian A. [1 ]
机构：
[1] Univ Texas Austin, Dept Chem Engn, Texas Mat Inst, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA
来源：
CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 23期
基金：
美国国家科学基金会;
关键词：
NANOSTRUCTURED SILICON; RAMAN-SPECTROSCOPY; AEROSOL-PARTICLES; STORAGE; DECOMPOSITION; SILANE; INSERTION; DISORDER; BEHAVIOR; SPECTRA;
D O I：
10.1021/cm102486w
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Colloidal particles of hydrogenated amorphous silicon (a-Si:H) were synthesized by decomposition of trisilane (Si(3)H(8)) in supercritical n-hexane (sc-hexane) at temperatures ranging from 380 to 550 degrees C. The reaction temperature, pressure and Si(3)H(8) concentration have a significant influence on the average particle size, Si bond order and hydrogen content. The particle diameter could be varied from 170 nm to 1.7 mu m, with hydrogen loadings between 10% and 58%. Raman spectroscopy of the particles revealed significant differences in Si bond order that correlated with hydrogen content, with the lowest reaction temperatures yielding particles with the least structural order and most associated hydrogen. Particles synthesized at temperatures higher than 420 degrees C had sufficient bond order to allow crystallization under the Raman laser probe.
引用
收藏
页码：6378 / 6383
页数：6
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