1.0PV Techhttps://www.pv-tech.orgBoron–oxygen-related degradation in multicrystalline silicon wafersrich600338<blockquote class="wp-embedded-content" data-secret="JJXCfLXwh7"><a href="https://www.pv-tech.org/technical-papers/boron-oxygenrelated-degradation-in-multicrystalline-silicon-wafers/">Boron–oxygen-related degradation in multicrystalline silicon wafers</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.pv-tech.org/technical-papers/boron-oxygenrelated-degradation-in-multicrystalline-silicon-wafers/embed/#?secret=JJXCfLXwh7" width="600" height="338" title="“Boron–oxygen-related degradation in multicrystalline silicon wafers” — PV Tech" data-secret="JJXCfLXwh7" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script>
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https://www.pv-tech.org/wp-content/uploads/2020/12/rune_sondena.jpg639303Extended crystal defects, such as grain boundaries and dislocations, have long been considered the main factors limiting the performance of multicrystalline (mc-Si) silicon solar cells. However, because the detrimental effects of these crystal defects are reduced as a result of improvements in the solidification process as well as in the feedstock and crucible quality, the degradation caused by boron–oxygen complexes is expected to be of increasing importance. Light-induced degradation (LID) occurs in both p- and n-type crystalline silicon solar cells that contain both boron and oxygen. Because of the fundamental differences in the solidification processes, mc-Si silicon contains less oxygen than Czochralski silicon; nevertheless, the oxygen content in mc-Si silicon is still sufficient to cause degradation, although to a lesser extent than in the case of Czochralski silicon. Whereas B–O-related degradation of 0.5 to 1% abs. can be found in Czochralski cells, the degradation in conventional mc-Si cells is limited to around 0.1 to 0.2% abs.