|
|
|
|
LEADER |
03065nam a2200349Ia 4500 |
001 |
10.1063-5.0082542 |
008 |
220510s2022 CNT 000 0 und d |
020 |
|
|
|a 00218979 (ISSN)
|
245 |
1 |
0 |
|a Participation of nitrogen impurities in the growth of grown-in oxide precipitates in nitrogen-doped Czochralski silicon
|
260 |
|
0 |
|b American Institute of Physics Inc.
|c 2022
|
856 |
|
|
|z View Fulltext in Publisher
|u https://doi.org/10.1063/5.0082542
|
520 |
3 |
|
|a For nitrogen-doped Czochralski (NCZ) silicon, it is well known that nitrogen (N) and oxygen (O) impurities can interact to form nitrogen-oxygen shallow thermal donors (N-O STDs); moreover, the N impurities can be involved into heterogeneous nucleation to facilitate the formation of grown-in oxide precipitates. However, how the N impurities participate in the growth of grown-in oxide precipitates during the post-anneal remains unclear. Besides, the correlation between the formation of N-O STDs and the growth of grown-in oxide precipitates is yet to be revealed. In this work, the effects of pre-anneals at temperatures of 900-1200 °C on the formation of N-O STDs at 650 °C in NCZ silicon have been first investigated. Thus, it has been found that the more significant growth of grown-in oxide precipitates during the pre-anneal, which consumes much more N impurities, leads to forming much fewer N-O STDs. This finding stimulates us to explore the mechanism for the participation of N impurities in the growth of grown-in oxide precipitates. To this end, the capture of N impurities by the oxide precipitates, on the one hand, and the release of N impurities from the oxide precipitates, on the other hand, have been investigated by two systematically constructed experiments. The obtained results enable us to reasonably propose that the N impurities participating in the growth of grown-in oxide precipitates predominately reside at the oxide precipitate/Si interfaces, which reduces the interfacial energies, thus favoring the growth of grown-in oxide precipitates. Such a viewpoint is well supported by the density functional theory calculations. In a word, this work has gained an insight into the mechanism for the participation of N impurities in the growth of grown-in oxide precipitates, starting from exploring the correlation between the formation of N-O STDs and the growth of grown-in oxide precipitates. © 2022 Author(s).
|
650 |
0 |
4 |
|a Density functional theory
|
650 |
0 |
4 |
|a Density-functional theory calculations
|
650 |
0 |
4 |
|a Doping (additives)
|
650 |
0 |
4 |
|a Heterogeneous nucleation
|
650 |
0 |
4 |
|a Impurities in
|
650 |
0 |
4 |
|a Nitrogen
|
650 |
0 |
4 |
|a Nitrogen impurity
|
650 |
0 |
4 |
|a Nitrogen-doped Czochralski silicons
|
650 |
0 |
4 |
|a Nucleation
|
650 |
0 |
4 |
|a Oxide precipitates
|
650 |
0 |
4 |
|a Oxygen
|
650 |
0 |
4 |
|a Post-anneal
|
650 |
0 |
4 |
|a Shallow thermal donors
|
650 |
0 |
4 |
|a Silicon
|
700 |
1 |
|
|a Lan, W.
|e author
|
700 |
1 |
|
|a Ma, X.
|e author
|
700 |
1 |
|
|a Wu, D.
|e author
|
700 |
1 |
|
|a Yang, D.
|e author
|
700 |
1 |
|
|a Zhao, T.
|e author
|
773 |
|
|
|t Journal of Applied Physics
|