Optimization of Rear Local Contacts on High Efficiency PERC Solar Cells Structures
Joint Authors
Zheng, Yi
Wijekoon, Kapila
Mungekar, Hemant
Wang, Dapeng
Zhang, Lin
Ponnekanti, Hari
Yan, Fei
Source
International Journal of Photoenergy
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-05-27
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
A local contact formation process and integration scheme have been developed for the fabrication of rear passivated point contact solar cells.
Conversion efficiency of 19.6% was achieved using 156×156 mm, pseudo square, p-type single crystalline silicon wafers.
This is a significant improvement when compared to unpassivated, full area aluminum back surface field solar cells, which exhibit only 18.9% conversion efficiency on the same wafer type.
The effect of rear contact formation on cell efficiency was studied as a function of contact area and contact pitch, hence the metallization fraction.
Contact shape and the thickness of Al-BSF layer were found to be heavily dependent on the laser ablation pattern and contact area.
Simulated cell parameters as a function of metallization showed that there is a tradeoff between open circuit voltage and fill factor gains as the metallization fraction varies.
The rear surface was passivated with an Al2O3 layer and a SiNX capping layer.
The rear surface contact pattern was created by laser ablation and the contact geometry was optimized to obtain voids free contact filling, resulting in a uniform back surface field.
The efficiency gain in rear passivated cells over the reference cells is mainly due to improved short circuit current and open circuit voltage.
American Psychological Association (APA)
Wijekoon, Kapila& Yan, Fei& Zheng, Yi& Wang, Dapeng& Mungekar, Hemant& Zhang, Lin…[et al.]. 2013. Optimization of Rear Local Contacts on High Efficiency PERC Solar Cells Structures. International Journal of Photoenergy،Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-466450
Modern Language Association (MLA)
Wijekoon, Kapila…[et al.]. Optimization of Rear Local Contacts on High Efficiency PERC Solar Cells Structures. International Journal of Photoenergy No. 2013 (2013), pp.1-8.
https://search.emarefa.net/detail/BIM-466450
American Medical Association (AMA)
Wijekoon, Kapila& Yan, Fei& Zheng, Yi& Wang, Dapeng& Mungekar, Hemant& Zhang, Lin…[et al.]. Optimization of Rear Local Contacts on High Efficiency PERC Solar Cells Structures. International Journal of Photoenergy. 2013. Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-466450
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-466450