Polycrystalline CdTe thin film mini-modules monolithically integrated by fiber laser
| Autor: | Nicola Romeo, Stefano Selleri, Alessio Bosio, Daniele Menossi, Annamaria Cucinotta, Michele Sozzi |
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| Rok vydání: | 2014 |
| Předmět: |
Photocurrent
Materials science business.industry Photovoltaic system Metals and Alloys Surfaces and Interfaces Laser Cadmium telluride photovoltaics Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention law Photovoltaics Fiber laser Materials Chemistry Optoelectronics Electrical measurements Thin film business |
| Zdroj: | Thin Solid Films. 562:638-647 |
| ISSN: | 0040-6090 |
| Popis: | The CdTe thin film technology for photovoltaics (PV) is attractive because of its potential low cost and good performance. In thin film technology the efficiency of large area cells can be maintained if small segments are interconnected in series to reduce the photocurrent and resistance losses. In respect to this, the scribing process is critical for the performance of the device. Today, fiber lasers represent the most advanced and cheap technology that can be used in PV industry to carry out the cuts, needed for the monolithic integration, at different deposition stages. We will present our results on the scribing of CdTe thin film solar cells by means of fiber lasers, with pulse duration of a few nanoseconds and solid state lasers in the picosecond regime. The quality of the scribing was evaluated by optical and scanning electron microscopy. Finally, mini-modules with a total area of 10 × 10 cm 2 were fabricated, in which the cells were interconnected in series by means of a scribing system, equipped with a fiber laser with the same characteristics of the system mounted on production lines. The mini-modules were characterized by photovoltaic and electrical measurements. |
| Databáze: | OpenAIRE |
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