Low Recombination Firing-Through Al Paste for N-Type Solar Cell with Boron Emitter

Autor:	Liu Yuan, Aichuang Zhang, Deliang Wang, Chengjiang Cao, Juan Tian, Zhu Peng
Rok vydání:	2021
Předmět:	fire-through Materials science Silicon chemistry.chemical_element low recombination lcsh:Technology Article law.invention Saturation current Aluminium Electrical resistivity and conductivity law Solar cell General Materials Science Composite material lcsh:Microscopy Ohmic contact lcsh:QC120-168.85 aluminum paste lcsh:QH201-278.5 lcsh:T Open-circuit voltage Energy conversion efficiency N-type solar cell chemistry lcsh:TA1-2040 boron emitter lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971
Zdroj:	Materials Materials, Vol 14, Iss 765, p 765 (2021) Volume 14 Issue 4
ISSN:	1996-1944
Popis:	A kind of low recombination firing-through screen-printing aluminum (Al) paste is proposed in this work to be used for a boron-diffused N-type solar cell front side metallization. A front side fire-through contact (FTC) approach has been carried out for the formation of local contacts for a front surface passivated solar cell. With a low contact resistivity (ρc) of 1.0 mΩ·cm2, good ohmic contact between the boron-doped front surface of the silicon sample and the Al paste was realized. To obtain a good energy conversion efficiency, a balance can be achieved between the open circuit voltage (Voc) and contact resistivity (ρc) of the cell by combining suitable Al powders and appropriate additives. The detailed micro-contact difference in Si/metallization between the firing-through Al paste and silver-aluminum (Ag-Al) paste was analyzed. The dark saturation current density beneath the metal contact (J0, metal) of the Si/metallization region using our firing-through Al paste was discussed, which was proven to be 61% lower than using Ag-Al paste. The pseudo energy conversion efficiency of the cell using Al paste measured by Suns-VOC was also higher than using Ag-Al paste. The role of Al paste in low surface metal recombination is discussed. The utilization of this new kind of Al paste was much cheaper and more convenient, compared to the traditional process using Ag or Ag-Al paste.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17867709251f57a86adddde501eee511 https://pubmed.ncbi.nlm.nih.gov/33561983 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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