Double Printing nPERT Cells with Narrow Contact Layers

详细信息    查看全文

• 作者：Jan Lossen^a ; ^{jan.lossen@isc-konstanz.de" class="auth_mail" title="E-mail the corresponding author} ; Dominik Rudolph^a ; Lejo J. Koduvelikulathu^a ; Ricardo Carvalho^b ; Mark P. Rossetto^b ; Oscar Borsato^c ; Emiliano Bortoletto^c ; Marco Galiazzo^c
• 关键词：screen printing ; nPERT ; contact formation ; n-type ; double printing
• 刊名：Energy Procedia
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：92
• 期：Complete
• 页码：939-948
• 全文大小：392 K

文摘

Screen printing of two different paste layers on top of each other is used for reducing the detrimental effect of the p+ contact to nPERT cells. For the contacting layer, a line width between 15 μm and 30 μm is used. In a second print step, using a wider opening, these contacting layers are augmented by a non-contacting paste layer to form a line of sufficient conductivity. Reduced shading and a smaller contact area lead to increased J_SC and V_OC. Still, an excessive reduction of the contact area causes an increase of contact resistivity compensating the gain. For an optimum configuration, an efficiency gain of up to 0.2%_abs and a reduction of paste consumption by 10 mg are demonstrated on precursors from industrial production.