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Open Access Nano Express

Laser irradiation of ZnO:Al/Ag/ZnO:Al multilayers for electrical isolation in thin film photovoltaics

Isodiana Crupi1*, Stefano Boscarino12, Giacomo Torrisi3, Giorgia Scapellato1, Salvatore Mirabella1, Giovanni Piccitto2, Francesca Simone2 and Antonio Terrasi12

Author affiliations

1 CNR-IMM MATIS, via S. Sofia 64, Catania 95123, Italy

2 Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia 64, Catania 95123, Italy

3 CSFNSM, viale A. Doria 6, Catania 95125, Italy

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Citation and License

Nanoscale Research Letters 2013, 8:392  doi:10.1186/1556-276X-8-392

Published: 23 September 2013

Abstract

Laser irradiation of ZnO:Al/Ag/ZnO:Al transparent contacts is investigated for segmentation purposes. The quality of the irradiated areas has been experimentally evaluated by separation resistance measurements, and the results are complemented with a thermal model used for numerical simulations of the laser process. The presence of the Ag interlayer plays two key effects on the laser scribing process by increasing the maximum temperature reached in the structure and accelerating the cool down process. These evidences can promote the use of ultra-thin ZnO:Al/Ag/ZnO:Al electrode in large-area products, such as for solar modules.

Keywords:
Transparent electrodes; Multilayers; Pulsed laser scribing; Thin film photovoltaics