Index of content:
Volume 6, Issue 1, January 2014
Laser ablation for the preparation of isolating trenches in transparent conductive oxide films on glass has been studied comparing the use of nano- and femtosecond pulses at approximately 1 μm wavelength. By a detailed analysis of the obtained ablation craters and grooves, it can be shown that this processing, which is called P1 scribing in the field of thin film photovoltaics, can be considerably optimized with so-called “cold” ablation: Using femtosecond pulses, the P1 scribe can be done with almost rectangular cross section profiles, achieving the required electrical separation already at widths well below 10 μm, without thermal and mechanical stresses in the substrate or adjacent material. Analogous preliminary results for P2 scribes indicate that this technique allows reducing the total scribe region (optically inactive zone) to widths below 50 μm.
- PREFACE TO SPECIAL TOPIC: SELECTED PAPERS FROM THE SPRING INTERNATIONAL SCHOOL, NEXTGEN NANO PV 2013
Preface to Special Topic: Selected Papers from the First Nanotechnology for Next Generation High Efficiency Photovoltaics Conference—NextGen Nano Photovoltaic, Cargèse, Corsica Island, France, 20136(2014); http://dx.doi.org/10.1063/1.4866005View Description Hide Description
The main idea of the NextGen Nano Photovoltaic (PV) Conference was to share the experience of researchers and engineers focused on new concepts at the nanoscale, where one can change the architecture of the solar cell and open new opportunities for low-cost processes to capture light, convert it, and then move charges through the solar cell structure. The timing of these two combined events (workshop and spring school in parallel) was excellent as these technologies could have a dramatic impact on efficiency, help produce low-cost devices and reduce the quantity of materials used, and thus lead the way to a true technological breakthrough leading to the mass deployment of photovoltaic technologies.