Surface Structure and Current Transport Property of
Boron and Phosphorus Co-Doped Silicon Nanocrystals
Masato Sasaki
Shinya Kano
Hiroshi Sugimoto
Kenji Imakita
Minoru Fujii
10.1021/acs.jpcc.5b05604.s001
https://acs.figshare.com/articles/journal_contribution/Surface_Structure_and_Current_Transport_Property_of_Boron_and_Phosphorus_Co_Doped_Silicon_Nanocrystals/2088082
Silicon
(Si) nanocrystals (NCs) with high boron (B) and phosphorus
(P) concentration shells are dispersible in polar solvents without
organic ligands. In order to understand the mechanism of the solution
dispersibility, the surface structure is studied by infrared absorption
spectroscopy. It is shown that water molecules are adsorbed at the
B–oxygen (O) bond sites on NC surface with high hydrogen bond
strength, and thus B and P co-doped Si-NCs are a kind of hydrate containing
large amounts of water molecules (Si-NC·<i>x</i>H<sub>2</sub>O). The current transport properties of Si-NC films made from
the solutions are studied. It is found that the conductivity is very
sensitive to the amount of adsorbed water molecules and changes by
8 orders of magnitude. The high affinity of the NC surface with water
molecules is considered to be the origin of the high sensitivity.
2016-01-14 00:00:00
NC surface
water molecules
hydrogen bond strength
Silicon
solution
Current Transport Property