20.8% industrial PERC solar cell: ALD Al₂O₃ rear surface passivation, efficiency loss mechanisms analysis and roadmap to 24%

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• 作者：Haibing Huang^a ; ^b ; ^{haibing.huang@chinasunergy.com} ; Jun Lv^a ; Yameng Bao^b ; Rongwei Xuan^a ; Shenghua Sun^a ; Sami Sneck^c ; Shuo Li^b ; Chiara Modanese^b ; Hele Savin^b ; Aihua Wang^a ; Jianhua Zhao^a
• 关键词：Aluminum oxide (Al2O3) ; Atomic layer deposition (ALD) ; Efficiency loss mechanism ; Local back surface field ; PC2D simulation ; Rear surface passivation
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：161
• 期：Complete
• 页码：14-30
• 全文大小：3213 K
• 卷排序：161

文摘

Key industrial PERC processes of O3 based ALD Al2O3 rear surface passivation and screen-printed Al LBSF are discussed. Industrial Al2O3 PERC cells demonstrate good performance: cell efficiency (20.5–20.8%) and Voc (660–666 mV). Light-induced degradation analysis shows that the PERC cells are subject to bulk degradation and not to surface degradation. We promote a roadmap to extend the cell efficiency to 24% based on the analysis of cell efficiency loss mechanisms.