Performance improvements of solar-grade crystalline silicon by continuously variable temperature phosphorous gettering process using a porous silicon layer

The Continuously Variable Temperature Phosphorous Gettering process using a Porous Silicon Layer (PSL-CVTPG) was proposed. PSL-CVTPG process can getter unwanted impurities from Solar-Grade silicon (SOG-Si) wafers and upgrade photovoltaic properties of solar cells more efficiently than conventional C...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Materials science in semiconductor processing 2010-09, Vol.13 (3), p.209-213
Hauptverfasser: Zhang, Caizhen, Liu, Su, Wang, Yongshun, Chen, Yonggang
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The Continuously Variable Temperature Phosphorous Gettering process using a Porous Silicon Layer (PSL-CVTPG) was proposed. PSL-CVTPG process can getter unwanted impurities from Solar-Grade silicon (SOG-Si) wafers and upgrade photovoltaic properties of solar cells more efficiently than conventional Constant Temperature Phosphorus Gettering process using a Porous Silicon Layer (PSL-CTPG). The resistivity, and mobility of majority carriers, and the effective lifetime of minority carriers were evaluated; the results showed that under certain conditions, the gettering effect of the PSL-CVTPG is better than that of the optimum PSL-CTPG. By orthogonal experiments, the optimum PSL-CVTPG conditions were found to be 900 °C/60 min+750 °C/60 min. PSL-CVTPG and CTPG processes under their respective optimum gettering conditions were used in the fabrication of solar cells, and cells based on SOG-Si wafers purified by the PSL-CVTPG process exhibited an amelioration in photovoltaic performances.
ISSN:1369-8001
1873-4081
DOI:10.1016/j.mssp.2010.10.015