Evidence of PbI2-Containing Debris Upon P2 Nanosecond Laser Patterning of Perovskite Solar Cells

Laser-based patterning for monolithic serial interconnection of metal halide perovskite (MHP) solar cells is a key process for industrial manufacturing of large-scale MHP solar panels. It requires reliable patterning process parameters to achieve low interconnection losses and, thus, high efficienci...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal of photovoltaics 2018-09, Vol.8 (5), p.1244-1251
Main Authors: Schultz, Christof, Schneider, Felix, Neubauer, Antje, Bartelt, Andreas, Jost, Marko, Rech, Bernd, Schlatmann, Rutger, Albrecht, Steve, Stegemann, Bert
Format: Article
Language:English
Subjects:
Ablation
Ablative materials
Contact resistance
debris
Electric contacts
Glass
laser
Laser ablation
Laser applications
Lasers
Mathematical analysis
Mesoporous materials
Morphology
patterning
perovskite
Perovskites
Photovoltaic cells
Process parameters
residuals
Solar cells
Surface emitting lasers
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Laser-based patterning for monolithic serial interconnection of metal halide perovskite (MHP) solar cells is a key process for industrial manufacturing of large-scale MHP solar panels. It requires reliable patterning process parameters to achieve low interconnection losses and, thus, high efficiencies. Here, P2 laser patterning of the perovskite layer was obtained by laser ablation using conventional nanosecond laser pulses at systematically varied laser fluences. The correlation of the laser impact to the morphology, composition, and electrical functionality was analyzed in detail by several surface-analytical techniques. The occurrence of laser-induced periodic surface structures and microdroplets at the bottom of the trenches indicates that material removal via stress-assisted ablation is strongly influenced by thermal processes. The formation of PbI 2 -containing residuals was evidenced, possibly causing contact resistance losses through the P2 interconnect. These results contribute to the identification of loss factors in laser-based serial interconnection of perovskite solar cells and to further process optimization for upscaling to industrial module sizes.
ISSN:2156-3381
2156-3403
DOI:10.1109/JPHOTOV.2018.2858934