Details
| Original language | English |
|---|---|
| Pages (from-to) | 515-522 |
| Number of pages | 8 |
| Journal | Energy Procedia |
| Volume | 92 |
| Publication status | Published - Aug 2016 |
| Event | 6th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2016 - Chambery, France Duration: 7 Mar 2016 → 9 Mar 2016 |
Abstract
The back end process of passivated emitter and rear cells (PERC) consists of at least one laser process and three screen-printing steps followed by the stringing and tabbing of the cells. To reduce the number of steps we have developed a process that metallizes the rear side including contact formation and simultaneously interconnects the cells. We attach an Al foil to an encapsulant layer. By laser processing we form 'laser-fired and bonding contacts' (LFBC) on the passivated rear side of the solar cells. The Al foil contacting the rear is laser welded to the Ag screen-printed front side metallization of the next cell and thus forms the cell interconnection. The laser contacts on the rear show a surface recombination velocity Scont for the contact regions of cm/s and a contact resistivity of 3.52 mΩcm2. We present a first proof-of concept module combining the in-laminate Ag-Al laser welding and the LFBC reaching an efficiency of 18.4%. In accelerated aging test modules show no degradation (< 1% in efficiency) after 100 humidity-free cycles.
Keywords
- laser fiered contacts, laser welding, module interconnection, PERC solar cells
ASJC Scopus subject areas
- Energy(all)
- General Energy
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In: Energy Procedia, Vol. 92, 08.2016, p. 515-522.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Simultaneous Contacting and Interconnection of Passivated Emitter and Rear Solar Cells
AU - Schulte-Huxel, Henning
AU - Petermann, Jan Hendrik
AU - Blankemeyer, Susanne
AU - Steckenreiter, Verena
AU - Kajari-Schroeder, Sarah
AU - Brendel, Rolf
N1 - Funding Information: The authors thank Ulrike Sonntag and Sarah Spätlich for cell processing and Thomas Friedrich for sample preparation. This work was supported by the Federal Ministry for Environment, Nature Conservation, and Nuclear Safety under the contract FKZ 0325192 (CrystalLine) and by the State of Lower Saxony.
PY - 2016/8
Y1 - 2016/8
N2 - The back end process of passivated emitter and rear cells (PERC) consists of at least one laser process and three screen-printing steps followed by the stringing and tabbing of the cells. To reduce the number of steps we have developed a process that metallizes the rear side including contact formation and simultaneously interconnects the cells. We attach an Al foil to an encapsulant layer. By laser processing we form 'laser-fired and bonding contacts' (LFBC) on the passivated rear side of the solar cells. The Al foil contacting the rear is laser welded to the Ag screen-printed front side metallization of the next cell and thus forms the cell interconnection. The laser contacts on the rear show a surface recombination velocity Scont for the contact regions of cm/s and a contact resistivity of 3.52 mΩcm2. We present a first proof-of concept module combining the in-laminate Ag-Al laser welding and the LFBC reaching an efficiency of 18.4%. In accelerated aging test modules show no degradation (< 1% in efficiency) after 100 humidity-free cycles.
AB - The back end process of passivated emitter and rear cells (PERC) consists of at least one laser process and three screen-printing steps followed by the stringing and tabbing of the cells. To reduce the number of steps we have developed a process that metallizes the rear side including contact formation and simultaneously interconnects the cells. We attach an Al foil to an encapsulant layer. By laser processing we form 'laser-fired and bonding contacts' (LFBC) on the passivated rear side of the solar cells. The Al foil contacting the rear is laser welded to the Ag screen-printed front side metallization of the next cell and thus forms the cell interconnection. The laser contacts on the rear show a surface recombination velocity Scont for the contact regions of cm/s and a contact resistivity of 3.52 mΩcm2. We present a first proof-of concept module combining the in-laminate Ag-Al laser welding and the LFBC reaching an efficiency of 18.4%. In accelerated aging test modules show no degradation (< 1% in efficiency) after 100 humidity-free cycles.
KW - laser fiered contacts
KW - laser welding
KW - module interconnection
KW - PERC solar cells
UR - http://www.scopus.com/inward/record.url?scp=85014434957&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2016.07.135
DO - 10.1016/j.egypro.2016.07.135
M3 - Conference article
AN - SCOPUS:85014434957
VL - 92
SP - 515
EP - 522
JO - Energy Procedia
JF - Energy Procedia
SN - 1876-6102
T2 - 6th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2016
Y2 - 7 March 2016 through 9 March 2016
ER -