期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 173, 期 -, 页码 25-32出版社
ELSEVIER
DOI: 10.1016/j.solmat.2017.06.038
关键词
Boron-oxygen; Czochralski silicon; Light-induced degradation; Carrier-induced degradation
资金
- Australian Government through the Australian Renewable Energy Agency (ARENA)
- Australian Center for Advanced Photovoltaics (ACAP)
- Norwegian Research Centre for Solar Cell Technology
- REC Wafer, REC Solar, Elkem Solar
- Norwegian Research Council through the KMB
- ARENA [1-A060]
- UK Institution of Engineering and Technology (IET)
c Fast and slow boron-oxygen related degradation in p-type Czochralski silicon is often attributed to two separate defects due to the different time constants and the determination of different capture cross section ratios (k). However, recent work has suggested the possible involvement of a single defect [1,2]. This study reviews recent evidence, and provides further evidence/analysis to demonstrate the involvement of a single defect, in four key areas: 1) Identical recombination properties in the fast and slow timescales [1]; 2) The ability to describe a multi-stage degradation of carrier lifetime with a single recombination active defect [1]; 3) The possible involvement of interstitial iron in accounting for higher apparent capture cross-section ratios during early stages of boron oxygen related degradation and recombination with a high capture cross-section ratio remaining after permanent deactivation; 4) The ability to modulate the fraction of fast and slow degradation by thermal annealing without modulating the total extent of degradation or recombination properties [2]. A revised parameterisation of the B-O related recombination is also presented, which suggests a stronger influence of acceptor-level related recombination than has been previously reported.
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