MWT meets PERC: Towards 20% efficient industrial silicon solar cells

We report latest progress in combining the Metal Wrap Trough (MWT) cell structure with passivated back surfaces (PERC approach). By adapting our industrial process sequences, we integrate MWT and PERC structures in remarkably lean process sequences, while industrially available equipment is being used in our PV-TEC pilot line. We demonstrate 19.4 % (18.9 % stabilized) efficient MWT-PERC cells with an industrial process on large area (149 cm 2) Czochralski grown p-type base material. We further present advanced p-type float-zone silicon MWT-PERC solar cells reaching efficiencies of 20.1 % on large area. This is to our knowledge the highest value for large area MWT-PERC solar cells reported so far. We further show latest results on emerging technologies which we believe will enable the industrially fabricated MWT-PERC solar cells to surpass 20 % efficiency on p-type Czochralski silicon

Brentano on Aristotle’s Categories

Brentano’s dissertation Von der mannigfachen Bedeutung des Seienden nach Aristoteles (On the Several Senses of Being in Aristotle) (1862) is examined in the light of the nineteenth-century debate on the Aristotelian categories. After providing an exposition of the conceptions of the main representatives of this debate, Adolf Trendelenburg and Hermann Bonitz, this paper assesses Brentano’s point of view on the meaning and origin of the Aristotelian categories. It shows (i) that Brentano assumes non-Aristotelian elements in his reading of the Aristotelian categories, (ii) that this depends on the fact that he shares Bonitz’s thesis, and (iii) that his reading is incomplete in the light of certain Aristotelian statements about non-being