Activation of Al2O3 surface passivation of silicon: Separating bulk and surface effects
Activation of Al2O3 surface passivation of silicon: Separating bulk and surface effects
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硅 Al2O3 表面钝化的活化:分离体效应和表面效应
DOI:
10.1016/j.apsusc.2023.158786
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发表时间:
2024
影响因子:
6.7
通讯作者:
Grant N
中科院分区:
文献类型:
--
作者:
Grant N
Understanding surface passivation arising from aluminium oxide (Al2O3) films is of significant relevance for silicon-based solar cells and devices that require negligible surface recombination. This study aims to understand the competing bulk and surface lifetime effects which occur during the activation of atomic layer deposited Al2O3. We demonstrate that maximum passivation is achieved onn- andp-type silicon with activation at ∼ 450 °C, irrespective of annealing ambient. Upon stripping the Al2O3films and re-passivating the surface using a superacid-based technique, we find the bulk lifetime of float-zone and Czochralski silicon wafers degrade at annealing temperatures > 450 °C. By accounting for this bulk lifetime degradation, we demonstrate that the chemical passivation component associated with Al2O3remains stable at activation temperatures of 450─500 °C, achieving an SRV of < 1 cm/s onn- andp-type silicon. In conjunction with the thermal stability, we show that films in the range of 3–30 nm maintain an SRV of < 1 cm/s when annealed at 450 °C. From atomic-level energy dispersive X-ray analysis, we demonstrate that, post deposition, the interface has a structure of Si/SiO2/Al2O3. After activation at > 300 °C, the interface becomes Si/SixAlyO2/Al2O3due to diffusion of aluminium into the thin silicon oxide layer.
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影响因子:
3
作者:
N. Grant;T. Niewelt;N. Wilson;Evangeline C. Wheeler-Jones;J. Bullock;M. Al-Amin;M. Schubert;A. V. van Veen;A. Javey;J. D. Murphy
通讯作者:
N. Grant;T. Niewelt;N. Wilson;Evangeline C. Wheeler-Jones;J. Bullock;M. Al-Amin;M. Schubert;A. V. van Veen;A. Javey;J. D. Murphy
DOI:
10.1002/pssr.201600080
发表时间:
2016
期刊:
physica status solidi (RRL) – Rapid Research Letters
影响因子:
--
作者:
N. Grant;V. Markevich;J. Mullins;A. Peaker;F. Rougieux;D. Macdonald
通讯作者:
D. Macdonald
DOI:
10.1109/jphotov.2013.2284375
发表时间:
2013
期刊:
2013 IEEE 39th Photovoltaic Specialists Conference (PVSC)
影响因子:
--
作者:
Adrienne L. Blum;J. S. Swirhun;R. Sinton;F. Yan;S. Herasimenka;T. Roth;K. Lauer;J. Haunschild;B. Lim;K. Bothe;Z. Hameiri;B. Seipel;R. Xiong;M. Dhamrin;J. D. Murphy
通讯作者:
J. D. Murphy
影响因子:
1.6
作者:
A. Wratten;D. Walker;E. Khorani;B. F. M. Healy;N. Grant;J. Murphy
通讯作者:
A. Wratten;D. Walker;E. Khorani;B. F. M. Healy;N. Grant;J. Murphy
DOI:
10.1016/j.egypro.2016.07.090
发表时间:
2016
期刊:
Energy Procedia
影响因子:
--
作者:
R. S. Bonilla;N. Jennison;D. Clayton;Katherine A. Collett;L. Rands;P. Wilshaw
通讯作者:
P. Wilshaw