Development of Large-Area Bifacial Interdigitated-Back-Contact (IBC) Solar cell with Industrial Production Environment

• Published in: 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC) pp. 3722 - 3726
• Main Authors: Li, Feng, Liu, Dawei, Wang, Ziqian, Zhai, Jinye, Zhang, Wei, Shen, Yanjiao, Shi, Jinchao, Song, Dengyuan, Cesar, Ilkay, Guillevin, Nicolas, Burgers, Antonius R., Venema, Peter
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-06-2018
• Subjects: Bifacial structure; Computer architecture; front floating emitter; interdigitated-Back-Contact (IBC); Metallization; Microprocessors; Photovoltaic cells; Production; Resistance; silicon solar cell
• DOI: 10.1109/PVSC.2018.8547673

IBC Solar cell process was developed based on the same process equipment as used for the Yingli N-type Panda Si solar cell technology. Recombination at surface and metal contact areas as well as contact resistivity were investigated and optimized to get a balance between Voc and FF. Moreover, the IR characteristics at -10V shown homogeneous temperature distribution upon reverse polarization, which indication of hotspot prevention by the structure of IBC cell design. The latest cell efficiency of 21.6% reached on 242.85 \mathrm {c}\mathrm {m}^{2} Si wafer demonstrates that production and commercialization of IBC solar cell based on Yingli N-type Panda solar cell production line is possible. Furthermore, the simple rear metallization design of IBC cell allows for a bifacial application and the cell efficiency of the champion cell on rear side is 15.92%.