All-inorganic colloidal silicon nanocrystals-surface modification by boron and phosphorus co-doping

作者：Fujii Minoru; Sugimoto Hiroshi; Imakita Kenji

来源：Nanotechnology, 2016, 27(26): 262001.

DOI：10.1088/0957-4484/27/26/262001

• silicon nanocrystals
• quantum dot
• doping
• colloid
• photoluminescence
• water dispersible

Si nanocrystals (Si-NCs) with extremely heavily B-and P-doped shells are developed and their structural and optical properties are studied. Unlike conventional Si-NCs without doping, B and P co-doped Si-NCs are dispersible in alcohol and water perfectly without any surface functionalization processes. The colloidal solution of co-doped Si-NCs is very stable and no precipitates are observed for more than 5 years. The co-doped colloidal Si-NCs exhibit size-controllable photoluminescence (PL) in a very wide energy range covering 0.85 to 1.85 eV. In this paper, we summarize the structural and optical properties of co-doped Si-NCs and demonstrate that they are a new type of environmentally-friendly nano-light emitter working in aqueous environments in the visible and near infrared (NIR) ranges.

• 出版日期2016-7-1