Growth of High Quality Silicon Mono Ingots by the Application of a Magnetic Cusp Field in Cz-Puller
| Autor: | Mosel, F., Molchanov, A., Fischer, B., Krischel, D., Seidl, A., Birkmann, B. |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: | |
| DOI: | 10.4229/27theupvsec2012-2av.4.3 |
| Popis: | 27th European Photovoltaic Solar Energy Conference and Exhibition; 933-938 The quest for the improvement of solar cell efficiency and a reduction of production costs was the intention for the joint project. The aim of this project is to work out the potential of the magnetic Czochralski technology as a process control system for the crystal quality, the process stability, material parameters and the performance of the solar cells in an industrial scale. Therefore a superconducting magnet in a cusp configuration (Bruker ASC GmbH) was installed on a Czochralski puller (PVA Tepla AG) for the growth of silicon mono crystals. Boron doped crystals were grown under various growth conditions for the production of full square 6 inch p-type wafers. These wafers were used for the characterization of the material parameters especially with respect to the oxygen content and were processed to standard (Al-BSF) and PERC solar cells (Schott Solar AG) for the evaluation of the cell parameters. It is experimentally confirmed that the suitable application of a cusp magnetic field increases process stability and allows a higher growth rate while simultaneously decreasing the oxygen content in the crystals significantly. It is shown that solar cells produced from these crystals show higher cell efficiency as well as smaller LID. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|