Laser irradiation of ZnO:Al/Ag/ZnO:Al multilayers for electrical isolation in thin film photovoltaics
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
Nanoscale Research Letters 2013, 8:392 doi:10.1186/1556-276X-8-392Published: 23 September 2013
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.